Answer:

olavi

AnswerCrossword Clue
OLAVINorwegian king, 995-1000
OLAVITenth-century Norwegian king
OLAVIFirst millennium Norwegian king
OLAVI10th century Norwegian king
OLAVIEarly Norwegian king
OLAVINorwegian king who died in 1000
OLAVILegendary Norwegian king
OLAVILegendary king of Norway
OLAVINorwegian king near the end of the first millennium
OLAVINorwegian king until 1000