I don't like
Finn. I think of a fish and then of Huckleberry.
But I certainly prefer
Finn to Fynn.
The other evening a youngish man from one of the far north Scottish islands (I didn't catch which one) was interviewed on BBC TV News for some locally-connected reason.
His surname was Craigie but his first name was one that's new to me - Thorfinn
Thorfinn is not in the BtN database except as a user-submitted name - it must be used in those northern islands, with their Norse links, because an
Earl of Orkney bore it.