for interest here is comparison with my 1881 Manx parentage ranking (1st 20)
see http://www.ee.surrey.ac.uk/Contrib/manx/famhist/fnames/sn1881.htm
2002 Order 1881 Order
Kelly Kell(e)y
Smith(NM) Quayle
Moore Cain(e)
Quayle Corlett
Jones (NM) Christian
Corlett Clague
Christian Moore
Cain Far(a)gher
Clague Cannell
Kneale Quirk
Shimmin Watterson
Taylor (NM) Corkill
Wilson (NM) Cubbon
Brown (NM) Tear(e)
Watterson Craine
Quirk Shimmin
Williams (NM) Bridson
Teare Kneal(e)
Corkill Kermode
Davies (NM) Cowley

NM = essentially a Non-Manx name and presumeably indicates the now 50%+ of non-Manx born residents

A brief check on one family I'm currently researching - Leece - indicates that the 2002 maps apart from the presence in German (actually in 19th C peak was in Patrick) do not reflect 18 & 19th century distributions - I wonder how many other names also so much altered in distribution