Heikkilä Genealogy and Heikkilä Family History Information

Heikkilä is a surname originating in Finland. The name is derived from Heikki, the Finnish equivalent of the Scandinavian name Henrik and the Germanic Henry, plus the suffix -lä, a patronymic indicating a child of a household headed by a man named Heikki. Among Finnish immigrants to North America, the name was sometimes Anglicized as Heikkila.

https://en.wikipedia.org/wiki/Heikkil%C3%A4