It might be helpful to also check the Finnish namesakes (kaima in Finnish). I have not checked these from anywhere, but these come to mind immediately:
Oliver ~ Olli (Ole or Olle in Swedish)
William ~ Ville, Viljami
Daniel ~ Taneli
Lucas ~ Luukas (direct translation, so not very Finnish)
Alexander ~ Aleksi, Aki
Benjamin ~ (I am not sure)
It might be helpful to also check the Finnish namesakes (kaima in Finnish). I have not checked these from anywhere, but these come to mind immediately:
Oliver ~ Olli (Ole or Olle in Swedish)
William ~ Ville, Viljami
Daniel ~ Taneli
Lucas ~ Luukas (direct translation, so not very Finnish)
Alexander ~ Aleksi, Aki
Benjamin ~ (I am not sure)