Yes Jane (thanks) I had found that reference and did wonder myself if there was a connection. It is certainly worth looking into. BTW Knickal was a name that 'died out', to be replaced by the name Criggal: http://www.isle-of-man.com/manxnotebook/fulltext/scrap3/ch05.htm
''Knickal [= Criggall]
Here the correct form has been quite superseded by its perversion, which, never common, is following its original to limbo.''

I have not yet found anything yet to confirm or disprove this but I will let you know if I do.