I just checked www.genealogia.fi/hiski
to see if there were any Kangaanpää-names in the churchbooks, and there WAS!
I was actually suprised, because I was so sure it was Kankaanpää...Well, anyway:
Most of the Kangaanpää-families lived in the Westside of Finland, in such towns like; Alavus, Ahlainen, Jalasjärvi, Kalajoki, Kristiinankaupunki, Lapua, Loimaa, Perho, Peräseinäjoki, Sievi, Tyrvää and Ylivieska.
Just let me know if you need some help to search some names or something!