Meanings
proper noun
- A surname originating as a patronymic.
Origin
From a medieval variant of the given name William.
Full word history & related roots →Cite this entry
APA
Gilliam. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Gilliam
MLA
“Gilliam.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Gilliam. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “Gilliam,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Gilliam.
Source: Gilliam on Wiktionary, CC BY-SA 4.0.