Hirai Family History
Hirai Name Meaning
Japanese: written 平井 ‘placid well’. It is a habitational name from Hirai-mura in Settsu (now part of Hyōgo prefecture). Families bearing this name descend variously from the Fujiwara Taira Minamoto and other clans. The name is also found in the Ryūkyū Islands.
Source: Dictionary of American Family Names 2nd edition, 2022