Insofar as Finnish víkingar are concerned, the answer is "enh, probably, but we don't have any literary evidence for it" because, well, we don't have any literary evidence for it. In the sagas, Finns tend to be depicted as either the vassals of Swedish jarlar, or somehow otherworldly (like the troll-mother of Grímr loðinkinni, although the historical accuracy of fornaldarsögur like Gríms saga Loðinkinna is suspect to say the very least, but the depictions of Finns in the sagas is a different discussion)

Archaeologically speaking, it's very difficult to determine if a person was a víkingr based solely on grave goods. Wealthy warriors could be outfitted lavishly and with goods from all over the world acquired through trade and without having to fór út á víking and raid via boat.