Ingvar
- Ingvar may also refer to Ingvar of Kiev and to Ingvar the Far-Travelled. For the nickel-iron alloy, see Invar. For the name, see Ingvar (name).
Yngvar Harra (or Ingvar) Proto-Norse *Ingu-Hariz (d. early 7th century) was the son of Östen and reclaimed the Swedish throne for the House of Yngling after the Swedes had rebelled against Sölvi.
Snorri Sturluson relates in his Ynglinga saga that King Ingvar, Östen's son, was a great warrior who often spent time patrolling the shores of his kingdom fighting Danes and Estonian vikings (Víkingr frá Esthland). King Ingvar finally came to a peace agreement with the Danes and could take care of the Estonian vikings.