The 'Belfast' Radcliffe family is very well documented.
See: http://www.isle-of-man.com/manxnotebook/famhist/families/radclff.htm
See also messages on this board, for example: http://www.isle-of-man.com/cgi-bin/interests/genealogy/bulletin/index.pl?noframes;read=508413
If you tell me specifically who you are looking for [names, dates] if not covered in the above sources, I can give you the connection.
Sue