I don't think Hen is neccesarily a Fife word, my MIL uses it to me and she is a Borderer through and through.
Once when we lived in Cambridgeshire, I got talking at mums and tots to antoehr scots girl - it was great, i could speak the way i always had. Anyway, she was from lossiemouth int eh North and me from Dumfriesshire in the south and we were chatting away, and we suddenly became aware that the whole room was quiet and everyone was staring at us. Then one of them piped up "what language were you talking"