Ookii is the Japanese word for "big" or "large". The sources checked do not record it as a personal name.
Cute
Black, White, Brown, Gold
Large
Unisex
Japanese
O
5 Letters
Spirits of the rice fields in Japanese mythology
A Japanese surname, written ちば, 千葉 or 地場
Eight in Japanese, also associated with loyalty.
A type of Japanese rice cracker
Japanese for 'happy' or 'joyful'