All over the world, ویلیام (William 
, Gulielmus 
, Viljams 
) is a prevalent male first name. The first name ویلیام is characteristic of the United States, where it is a widespread boy's name, Nicaragua, where it is a common male name, and the United Kingdom (explore the name in all countries). Not in comparison with a country's population, the name is most common in the United States, Brazil, and the United Kingdom. Very seldom, ویلیام is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| William | United Kingdom, Philippines, United States, Tanzania, Brazil |
| Gulielmus | Spain, Belgium, South Africa |
| Viljams | Latvia |
| ویلیام | Iran |
Bill, Billy, Ghilherme, Goulielmos, Guglielmo, Guilhem, Guilherme, Guillaume, Guillem, Guillerme, Guillermo, Guillén, Gwilherm, Gwilym, Gwyllym, Morad, Murad, Rosko, Uilyam, Vilem, Vilhelm, Vilhelmo, Vilho, Viliamu, Vilijam, Viljam, Viljami, Viljem, Viljo, Vilmos, Vilyam, Vilém, Wai-Lim, Wei-Lian, Wei-Lien, Wilhelm, Wilhelm Carl, Wiliam, Will, Willem, Williams, Wilyam, Wiremu, Wm., Wyliam, Wylyam, Μπιλ, Бил, Билл, Біл,
ویلیام is also a prevalent name for the fictitious and mythical characters: William Tell , the folk hero of Switzerland; Captain Marvel , the fictional DC character, Batman: The Brave and the Bold; William Riker , the fictional character in Star Trek; Buck Rogers , the science fiction hero, Amazing Stories and Mr William Collins , the fictional character from Pride and Prejudice by Jane Austen, Pride & Prejudice, and in many other works.
| ویلیام خنو Iranian-Assyrian composer and pianist, IR (b. 1934) |
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| ویلیام بین فیشر IR |
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