Twin names for William
Looking for a twin name for William? The list is ranked by how well each name matches William on style, length and first letter — and how firmly it avoids rhyming.
Boy twin names for William
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Henry 95
HEN-ree
Vintage and royal style
Has Hank and Harry as short forms; opens on a firm consonant.
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David 93
DAY-vid
From Hebrew Dawid, connected with a root commonly glossed as beloved · Name-history reference
Shorter written out than William; the same classic and timeless feel as William.
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Michael 89
MY-kəl
Classic and biblical style
Hebrew where William is Germanic — a mix; consonant-forward, so it lands with a bit of edge.
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Daniel 88
DAN-yəl
Classic and biblical style
A Top 100 name, familiar without being everywhere; starts with "D", not William's "W", giving the names different first initials.
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Joseph 86
JOH-zəf
Classic and royal style
An even two-syllable name, easy to say; a different ending sound from William.
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Thomas 83
TOM-əs
Classic and royal style
Opens on "T" against William's "W"; a vintage name having a comeback.
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Charles 79
CHARLZ
Royal and vintage style
The same royal and classic feel as William; Germanic in origin, the same as William.
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James 75
JAYMZ
Classic and short style
Sits at William's level of popularity; more consonants than vowels — a firmer sound.
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Ethan 73
EE-thən
Classic and biblical style
Has Eeth as a short form; brings Hebrew roots alongside William's Germanic ones.
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Santiago 71
sahn-tee-AH-go
Combines a Spanish title for saint with Yago, a form of James · Name-history reference
2 syllables longer than William, a clear contrast; William ends on an "m", Santiago on a soft vowel — a clean contrast.
Girl twin names for William
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Emma 96
EM-uh
Classic and gentle style
Opens on a vowel — a soft, rounded start; Germanic in origin, the same as William.
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Charlotte 91
SHAR-lət
Royal and vintage style
Listed in our girls name group; the same royal and classic feel as William.
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Olivia 83
oh-LIV-ee-uh
Usually associated with the Latin word for olive; its formation is not certain · Name-history reference
The soft "-a" ending common in girls' names right now; neither name stands out next to the other.
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Ellie 82
EL-ee
Sweet and classic style
Runs to the same length as William out loud; a different first letter from William — easy to tell apart on school and doctor's forms.
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Abigail 79
AB-ih-gayl
Biblical and classic style
About as well-known as William right now; shortens to Abby and Gail.
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Sophia 76
soh-FEE-uh
Classic and romantic style
Brings Greek roots alongside William's Germanic ones; a longer, flowing 3-syllable name.
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Ava 74
AY-vuh
Short and glamorous style
Starts with "A", not William's "W", giving the names different first initials; starts on a vowel, softening William's firmer ending.
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Eleanor 73
EL-uh-nor
Vintage and royal style
More vowels than consonants — an easy, open sound; a syllable longer than William — a gentle change of pace.
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Elizabeth 71
eh-LIZ-uh-bəth
Royal and classic style
Well-known but not in the very top handful; more consonants than vowels — a firmer sound.
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Lily 69
LIL-ee
Nature and sweet style
Classic, like William; William ends on an "m", Lily on a soft vowel — a clean contrast.
Reading the scores
The score ranks each pairing with William using our editorial rules for shared style, rhyme, initials, length and popularity bands. It is a comparison within this list, not a percentage or a prediction of what your family will like. How the score works. Popularity figures use US SSA records for 2025. Name-history notes are shown only where a reference is recorded; origins and pronunciations can vary. The best-scoring twin for William here is Emma.
See also: middle names for William · sibling names for William
Common questions
What twin name goes with William?
Matched same-sex options: Henry, David, Michael, Daniel.
For a girl twin: Emma, Charlotte, Olivia, Ellie. Each one sits well next to William without echoing it. 12 of the 20 names on this page have the same 2-syllable length as William.
How closely should twin names match?
Closer than ordinary siblings, but not all the way. A twin of William can share its style and length; what it should not do is rhyme with William, which is the biggest penalty in the twin score.
Should William's twin have a different first letter?
School registers, medical forms and camp lists often go by first initial and surname. A twin of William whose name also starts with "W" can be harder to distinguish from William on some records, so the twin score rewards a different first letter. None of the names on this page start with "W".
Where does the data come from?
The popularity ranks for William and each twin name are from US Social Security Administration records. The pairing score is our own, based on style, length, first letter and sound — the how-we-score page walks through it.