Ninian

Meaning unknown. It appears in a Latinized form Niniavus, which could be from the Welsh name NYNNIAW. This was the name of a 5th-century British saint who was apparently responsible for many miracles and cures. He is known as the Apostle to the Picts.

NYNNIAW   male   Ancient Celtic
Meaning unknown, presumably of Welsh origin. According to the 12th-century chronicler Geoffrey of Monmouth, this was the name of a Welsh prince who fought against the invading forces of Julius Caesar. It was also borne by an 8th-century Welsh historian, usually known by the Latinized form Nennius.
EQUIVALENTS
ANCIENT CELTIC: Ninian
IRISH: Ninian
SCOTTISH: Ninian
OTHER FORMS
ANCIENT CELTIC: Nynniaw
DANISH: Vivi, Vivian
ENGLISH: Vivian, Vivyan
FRENCH: Viviane
LITERATURE: Vivien
NORWEGIAN: Vivi, Vivian
SWEDISH: Vivi, Vivian