Head to head · Boys' names
Sonny vs Sullivan
#298 vs #314 in 2025 · both climbing the charts fast
Sonny is a whisker ahead (#298 vs #314 in 2025) and both are climbing the charts fast. The records will not split these two — sound, story and your own last name will.
Cast your vote
Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
The tale of the tape
On the charts, Sonny leads 5 measures of 6; Sullivan leads 1.
Ranks, counts and years are measured in the official US birth record; the classroom and living figures are estimates computed from it. The dot marks the side each measure favours on the charts — more common, not better.
What the records say
146 years of US births, drawn on one scale
Two curves, one scale
Who owned which decade
- 1880s: Sonny #815, Sullivan #777 — Sullivan higher
- 1890s: Sonny #1040, Sullivan #805 — Sullivan higher
- 1900s: Sonny #913, Sullivan #836 — Sullivan higher
- 1910s: Sonny #1418, Sullivan #1812 — Sonny higher
- 1920s: Sonny #1226, Sullivan #2275 — Sonny higher
- 1930s: Sonny #574, Sullivan #2334 — Sonny higher
- 1940s: Sonny #580, Sullivan #2173 — Sonny higher
- 1950s: Sonny #643, Sullivan #2295 — Sonny higher
- 1960s: Sonny #646, Sullivan #3067 — Sonny higher
- 1970s: Sonny #514, Sullivan #3831 — Sonny higher
- 1980s: Sonny #589, Sullivan #4492 — Sonny higher
- 1990s: Sonny #801, Sullivan #1858 — Sonny higher
- 2000s: Sonny #837, Sullivan #941 — Sonny higher
- 2010s: Sonny #824, Sullivan #468 — Sullivan higher
- 2020s: Sonny #408, Sullivan #358 — Sullivan higher
Sonny stood higher in 10 of 15 decades; Sullivan has held the lead since the 2010s.
Rank by decade
| Decade | Sonny | Sullivan |
|---|---|---|
| 1880s | #815 | #777 |
| 1890s | #1040 | #805 |
| 1900s | #913 | #836 |
| 1910s | #1418 | #1812 |
| 1920s | #1226 | #2275 |
| 1930s | #574 | #2334 |
| 1940s | #580 | #2173 |
| 1950s | #643 | #2295 |
| 1960s | #646 | #3067 |
| 1970s | #514 | #3831 |
| 1980s | #589 | #4492 |
| 1990s | #801 | #1858 |
| 2000s | #837 | #941 |
| 2010s | #824 | #468 |
| 2020s | #408 | #358 |
Average national rank across each decade. A dash means the name sat outside the recorded top of that decade.
Around the world
Sonny
- Scotland#26
- England & Wales#51
Sullivan
Not charting outside the US.
National statistics offices, latest published year.
The names themselves
Meaning, roots, sound and the people who carried each
Where each name comes from
Sonny
'sonny' — an affectionate English term for a boy, from 'son'
The word traces back through English 'son' to Old English sunu. As a given name it comes from the pet-name use, not from any separate root.
sunu (Old English) → son → sonny → Sonny
How it traveled
English has used 'sonny' as a fond form of address to a young boy since the nineteenth century, and in American speech especially it became the household name of countless eldest sons who were never called anything else. From there it made the ordinary journey of a spoken nickname onto birth certificates, first as an informal second name and eventually on its own.
Sullivan
From Irish Ó Súilleabháin, 'descendant of Súilleabhán' — a name built on súil, 'eye'
Everyone agrees on the first element: súil, the Irish word for eye. The second is where scholars part ways. The common reading takes it as dubh, 'black' or 'dark', giving 'dark-eyed one'. Others have read the name as 'one-eyed' or 'hawk-eyed'. The eye is certain; what is being said about it is not.
Súilleabhán → Ó Súilleabháin → O'Sullivan → Sullivan
How it traveled
Sullivan is the anglicized form of Ó Súilleabháin, the surname of a sept that held land in Tipperary before the Norman arrival in the twelfth century and afterwards pushed south-west into Cork and Kerry, where the O'Sullivan Beare branch ruled the Beara peninsula. It became one of the most numerous surnames in Ireland, and Irish emigration carried it in quantity to the United States, where the O' was widely dropped.
Where a reading is contested the note says so — this page does not turn a guess into a fact. The chain is each name's recorded forms, oldest first; the story is its opening, told in full on the name's own page.
Out loud, and in short
Sonny
SUN-ee
Rhymes with 'money'. It sounds identical to Sunny, so the spelling has to be given aloud rather than assumed.
- Son — Older, chiefly Southern US form of address; rarely used as a written name today.
- Sonny Boy — Affectionate household extension rather than a name anyone is registered under.
Sullivan
SUL-uh-vun
Three syllables, stress on the first. The middle vowel is a light one and often disappears in fast speech, leaving something close to SUL-vun. Double L in the spelling, single V.
- Sully — The default short form, used from the playground upward; also stands on its own as a surname and occasionally as a given name.
- Sull — A clipped, informal version, mostly heard among friends and teammates rather than family.
- Van — Taken from the end of the name rather than the start; less common, and doubles as an independent given name.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Sonny if you want…
- a name most people already know#298 in 2025, 1,137 babies that year
- a name on the way upup 236 places on the charts in five years
- a name with fewer syllablesSonny is 2 syllables to Sullivan's 3
- a name that charts abroad tooSonny is on the national lists of Scotland and England & Wales
Choose Sullivan if you want…
- a name fewer children share#314 in 2025 — sullivan will almost certainly be the only one in school
- a name with more sound in itSullivan runs 3 syllables, Sonny 2
Each line is a measured difference between the two names — a rank, a count, a recorded form — never a judgement of either. Save the one that answers your question; it lands on your shortlist.
The trade-offs, name by name
Sonny
Strengths
- Short, two syllables, and pronounceable on sight for anyone who reads English — no correction needed at introductions.
- Already established as a given name in the US, England and Wales, and Scotland, so it travels without explanation across English-speaking countries.
- Long documented history in American usage, first as a household nickname and later as a registered name in its own right.
To consider
- Sunny is the homophone, and it is used for girls. Expect a lifetime of spelling it out over the phone, and of forms coming back with the wrong vowel.
- 'Sonny' is still a word — older speakers sometimes use it to address a boy or a younger man, occasionally with a note of condescension. Most people meeting a Sonny today will simply hear the name.
- There is no long formal version underneath it, so there's no fallback for contexts where someone wants a more official-looking first name. That matters less than it once did, though a longer middle name gives an easy option.
Sullivan
Strengths
- The spelling is already familiar to almost everyone as a surname, so it is read correctly on sight and rarely needs to be spelled out.
- Sully is a ready-made short form with a long history behind it, so the name works at full length and at speed.
- Documented in American records since the nineteenth century — long enough to have a track record, without ever having been a crowd.
To consider
- It reads as a surname first. Expect forms, rosters and teachers to occasionally flip it into the last-name field, and expect the odd 'and your first name?' in reply.
- The Irish-family association is strong and specific. Some families love that; others may find it makes a claim about ancestry they had not meant to make.
- It is currently rising rather than settled, which means a child named Sullivan today will likely be the only one in the class but may not be the only one in the generation.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
With your last name
Say both in full. The notes are facts about letters and sound — a rhyme, a shared initial, the monogram — not a verdict on either name.
Type a last name to hear Sonny and Sullivan in full.
Weighing the whole shortlist? Run the full comparison — up to eight names with your last name, initials, classroom projections and a printable report.
Decide together
Nobody names a baby alone
Still torn between Sonny and Sullivan?
Put both to the vote.
One link to your partner, your parents, your sister. Each of them gets the two names, a one-tap answer and room to say why — and every reply lands in one place.
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More than two in the running? Settle it with a bracket or run the full comparison with your last name.
More head-to-heads
Same measures, different pair. Sixty more are dealt daily in the arena.
Lists that carry both names
Every list here names both Sonny and Sullivan — the same style, ranked by the same records.
Sonny or Sullivan — the short answers
- Which is more popular, Sonny or Sullivan?
- Sonny, in 2025: Sonny ranked #298 with 1,137 babies; Sullivan ranked #314 with 1,083 babies.
- Which name is rising faster, Sonny or Sullivan?
- Sonny. Over the last five years Sonny moved up 236 places; Sullivan moved up 84 places.
- Which is the older name, Sonny or Sullivan?
- Sonny entered the US charts in 1888; Sullivan entered the US charts in 1884. On the American record, Sullivan is the older name.
- How many people are named Sonny and Sullivan?
- About 19,000 people named Sonny are estimated to be alive in the US today. About 15,000 people named Sullivan are estimated to be alive in the US today.
- Will there be other Sonnys or Sullivans in the classroom?
- Sonny will almost certainly be the only one in school. Sullivan will almost certainly be the only one in school.
US figures from the Social Security Administration, 1880–2025; international figures from national statistics agencies. Votes are battle voters on this site, not the birth record. Data & methodology
Keep playing
Sixty more head-to-heads are dealt in the arena every day — or line up Sonny, Sullivan and the rest of your shortlist with your last name in one printable report.
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