Fun Facts About the Name Illiam
- 42 babies named Illiam: U.S. records list 42 babies given the name Illiam from 1880 through 2025.
What Does the Name Illiam Mean?
Illiam is the Manx form of William, a name that comes from the Germanic name Willahelm. Its established meaning is 'resolute protector' or, more literally, 'will helmet,' from the elements wil ('will, desire') and helm ('helmet, protection'). The literal Germanic sense is a compound of 'will' and 'helmet'; 'resolute protector' is the customary English interpretation. Manx is a Goidelic Celtic language of the Isle of Man, and Illiam is a Manx adaptation of the imported name rather than a native Manx word. The same parent name appears in Irish as Uilliam and in Scottish Gaelic as Uilleam.
Illiam Name History & Origins
Illiam developed as the Manx equivalent of William after the name became common in Britain. William was spread by the Normans after the Norman Conquest of England in 1066, and vernacular forms of the name passed into the Gaelic-speaking areas of the British Isles. In Irish the name became Uilliam, in Scottish Gaelic Uilleam, and in Manx Illiam. Manx was the everyday language of most people on the Isle of Man for centuries, and the name belongs to that language's naming tradition.
A notable historical bearer was William Christian (died 1663), a Manx politician and soldier known in Manx as Illiam Dhone, usually translated 'Brown William' or 'Brown-haired William.' He was executed in 1663 and is a well-known figure in Manx history. His Manx name is recorded in accounts of the island, and it provides a documented example of Illiam in use. As a given name, Illiam remains a Manx form of William rather than a separate English name with an unrelated origin.
How Popular is the Name Illiam?
Illiam has historically been an exceptionally rare given name in the United States, remaining well outside the national mainstream. It saw its highest recorded annual births in 1981. Its best rank was #4,699 in 1981.
U.S. name popularity from 1880-2025, based on SSA data. Rank shows how the name compares with other names - lower numbers mean greater popularity. Births shows how many babies received the name each year.
| Year | Rank | Births | % |
|---|---|---|---|
| 1989 | #7,350 | 6 | 0.0003% |
| 1987 | #5,723 | 7 | 0.0004% |
| 1986 | #7,144 | 5 | 0.0003% |
| 1985 | #6,083 | 6 | 0.0003% |
| 1983 | #6,671 | 5 | 0.0003% |
| 1981 | #4,699 | 8 | 0.0004% |
| 1975 | #5,815 | 5 | 0.0003% |
Name popularity over more than a century, based on Social Security Administration data. Gaps in the chart indicate years when the name does not appear in the published records.
Most Popular Boy Names That Start with I
How the Name Illiam Shapes Your Personality and Life?
Your tendency is to finish whatever you start. You like to use the pen or the needle (writing, fashion design etc). You are loving, compassionate, intuitive and humanitarian. Runs of luck, either good or bad, follow you. You are sympathetic, but at times might be touchy and oversensitive. You may have a gift for writing. You are intuitive and might be interested in the arts, drama or science.
You are always looking for an opportunity to achieve financial and emotional security. You are basically peacemaker. You understand the law of harmony and desire to balance your life with those around you. You may feel incomplete without someone to share your love, ideals, wealth or work. You can be very sensitive and could appear a bit shy and perceptive. You have developed intuition, patience and the ability to nurture others. You can achieve the state of happiness if you are willing to accept your needs in a complimentary relationship and go to create them.
✦ Illiam's Deeper Meaning & Tips for Parents Discover Illiam's symbolic numbers and practical tips for choosing a name that complements your child's birth date.