How Many People Are Named Illiam?
people named Illiam are alive in the United States today (estimate)
About 1 in 8,763,714 people in the US has this name
Based on 42 babies named Illiam in Social Security records from 1975 to 1989, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Population Percentage
Of US population
Peak Year
8 births
Trend
Last year given
📖 Name Origin & Meaning
Meaning:
Manx form of WILLIAM.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
All of the babies given the name Illiam in the records were boys.
👥 Age Distribution
The average person named Illiam alive today is about 41 years old, and 100% are between 30 and 59.
📈 Popularity Over Time
Illiam first appears in the records in 1975 and was given most often in 1981, to 8 babies. The last year it was given to at least 5 babies of one sex was 1989.
Babies given the name each year, 1975 to 1989
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