onomasti
1
Jan

Bill

A form of Vasileios

Basil, in English

Saint Basil the Great — the fourth-century bishop of Caesarea, kept on New Year's Day.

It keeps the same day as the name it comes from — everything below is that name’s.

Recorded as a diaspora substitution — read how the names changed →

Origin

The story of Vasileios

Vasileios keeps 1 January — the feast of Saint Basil the Great, one of the great bishops of the fourth-century Church.

The name is openly regal. Βασίλειος is built on βασιλεύς (basileús), the Greek word for “king” — so the name simply means “royal, kingly.”

“Royal, kingly — from the Greek word for king.”

onomasti · Vasileios

Key facts

Vasileios at a glance

Name day
1 January
This year · 2026
Thursday, 1 January
Next year · 2027
Friday, 1 January
Meaning
Βασίλειος — from βασιλεύς (basileús, “king”), “royal, kingly”
Patron of
Saint Basil the Great

Variations

Forms & nicknames of the name

One name takes many forms — the formal, the everyday, the affectionate, and the spellings that travelled abroad. Each has its own page here, and all share the same day.

Greek forms

English & romanised

VasileiosBasil you are hereBill Vasilis

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