Koga Family History
Koga Name Meaning
Japanese: meaning ‘old river’ and variously written such as 古河 or 古賀 with one ancient variant of imperial descent written 久我 and pronounced Kuga; other alternate readings are Furukawa or Kogawa and are derived from a village named Koga in Shimōsa (now Chiba prefecture). The most common Koga name is mainly found in Kyūshū and is descended from the Takeda family. The name is also found in the Ryūkyū Islands.
Source: Dictionary of American Family Names 2nd edition, 2022