indicate the level to which a name has been verified.
Meaning & History
A variant of the finnish word (rasi) for a forest that has been cleared for slash and burn but has not yet been burnt for agricultural means. The suffix "-la" is usually added to the stem of the word to indicate a location. In this occasion, I reckon, that "Rasila" indicates a person who got his/her living out of agricultural way that utilized slash and burn of forests.