Well done, Frances! My first reaction to this was to say (to myself) that anyone who offers "information" without quoting a checkable source isn't worth worrying about but clearly Barry is interested in this topic and it would be worth doing if done well.

It would be interesting to compare Manx names / non-Manx names like Dickson / williamson / Grice with a long association with the Island / names which are much more recent. I think I'm trying to encourage someone who DOES have a Manx telephone directory to hand to take this on! Anyone interested?

Apart from the Manx names, my family on the Island tend to be either Stevens or Williams - both English names but with a 3/4 generation presence. Neither appears in the list although there are plenty of both in the telephone directory.