Koistinen Family History
Koistinen Name Meaning
Finnish: from the personal name Koisti the Finnish form of Konstantin (see Constantine ) + the surname suffix -nen. Recorded since the 16th century in Savonia in the east of Finland from where it spread to North Karelia Kainuu Ostrobothnia and somewhat to the Karelian Isthmus.
Source: Dictionary of American Family Names 2nd edition, 2022