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Home › Baby Names Directory › Jilliam

Jilliam

♀ Girl

Pronounced JIL-ee-uhm /ˈdʒɪl.i.əm/Medium

Meaning: Jilliam reads as a variant of Jillian, which comes from Juliana, the feminine of Julian, from the Roman family name Julius. The final -am, in place of Jillian's -an, may be a spelling variation; the meaning is inherited from the Julian/Juliana line.Low

In 30 seconds: Jilliam is a variant of Jillian (said JIL-ee-uhm), from Juliana and the Roman name Julius. It appeared in the nineteen-eighties and stayed rare.
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Origin LowLatin, American
MeaningJilliam reads as a variant of Jillian, which comes from Juliana, the feminine of Julian, from the Roman family name Julius. The final -am, in place of Jillian's -an, may be a spelling variation; the meaning is inherited from the Julian/Juliana line.
U.S. rank (1993)#14447 ↘ Falling
1993 U.S. births5 girls (0.00% of U.S. girls)
Peak year1987
Total births (all-time)≈ 102

Popularity in the U.S. · SSA data

peak 198719821993

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Jilliam is best read as a variant of Jillian, from Juliana, the feminine of Julian and ultimately the Roman family name Julius. The unusual -am ending may be a spelling variation of Jillian's -an; the Roman roots supply the meaning while the form is modern.

Jilliam appears for American girls mostly in the nineteen-eighties, given to only about fifteen a year at its peak and never common. A girl named Jilliam then would be in her thirties or forties today.

Did you know? Jilliam traces back through Jillian and Juliana all the way to the Roman Julius - the same ancient family name behind July and Julia - showing how far a modern spelling can reach.
Overall data confidence 30%
References - Jilliam — Variant of Jillian; Juliana/Julian/Julius; possible spelling variation; plain-Latin only.

Variations

JillianGillianJilian

Nicknames

JillLily

Famous Bearers

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If you like Jilliam…

Jillian— the standard name Jilliam varies
Gillian— a like Juliana-rooted spelling
Lillian— shares the -llian/-lliam sound
Jill— the short form of the same name

Explore names like Jilliam

By themeuncertainmodernvariantlatin-rooted

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Frequently Asked

What does the name Jilliam mean?

Jilliam is a variant of Jillian, from Juliana (feminine of Julian, the Roman family name Julius); the -am ending may be a spelling variation.

How do you pronounce Jilliam?

It is said JIL-ee-uhm /ˈdʒɪl.i.əm/ - three syllables, stress on the first.

Is Jilliam a boy or girl name?

Jilliam is used as a girl's name.

How popular is Jilliam?

It was always rare in the United States, given to only about fifteen girls a year even at its peak in the nineteen-eighties.

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