The name comes from basileus, the Greek title for king — the word Byzantine court documents used for emperors and liturgists used for Christ as cosmic ruler. Its most important bearer is Basil the Great, the fourth-century bishop of Caesarea who organized hospitals for the poor, shaped Eastern monasticism through his Rule, and argued theology with the precision of a jurist. His feast falls on New Year's Day, when Greek families cut the vasilopita cake in his honor and his name is everywhere in the room.
Four syllables, vah-SEE-lee-os, with a stately middle and a soft close — the name compresses in daily use to Vassilis or the more intimate Vasso, both of which carry warmth without losing their origin. In 2026 Vassilios belongs to the same heavyweight division as Athanasios and Evangelos: a name of serious Orthodox pedigree, rarely encountered outside Greek communities, and all the more distinctive for it. It wears a thin golden circlet well, bookish and benevolent, the name of a man who uses his authority to build things rather than to enforce them.
Popularity
1880 to today
US SSA data. Lower rank number means more popular. A flat line at the top of the chart means the name did not rank in the top 1000.
Nicknames
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