Hello Welcome to Rootschat!
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There is also a little bit of information here:
http://www.rasmussen.org/name.html& the list Catswiskers posted above is here:
http://lists.rootsweb.com/index/surname/r/rasmussen.htmlYou may also find the Rasmussen forum of interest for people researching the same name:
http://genforum.genealogy.com/rasmussen/The Latter day saints site also lists many Christian Rasmussen's in Denmark:
http://www.familysearch.org/Eng/Search/frameset_search.aspAs you are not sure of when Christian arrived in the U.K I looked at the 1901 census he doesn't seem to be living in the UK at that time. However he may have had family living in the U.K before his arrival: There are also 105 Rasmussen's listed in the 1901 UK census:
http://www.1901census.nationalarchives.gov.uk/28 born in Denmark (with that spelling):
Name Age Where Born Administrative County Civil Parish Occupation
Alfred Rasmussen 28 Denmark Foreign Subj Middlesex Enfield Gardener
Anders Rasmussen 31 Denmark Danish Subject Glamorganshire Engineer
Andreas Rasmussen 43 Denmark East Sussex Mate
Andrew Rasmussen 34 Denmark Danish Subject London St Giles & St George Bloomsbury Bootmaker
Andrew Rasmussen 50 Denmark Ship Worker
August Rasmussen 37 Denmark Danish Subj London St Marylebone Cabinet Maker
Axel Rasmussen 18 Denmark Kingston Upon Hull Ordinary Seaman
Carl Rasmussen 33 Denmark Danish Subject Kent Erith Gun Maker Fitter
Charles Rasmussen 61 Copenhagen Denmark Danish Subject Lancashire Chorlton C Hardy Eg Importer
Christina Rasmussen 26 Denmark London St Pancras Shoemaker
Edward Rasmussen 32 Denmark Danish Subj Northumberland Worker
Ferdinand Rasmussen 44 Denmark Danish Subject Northumberland A B Seaman
Hans Rasmussen 27 Denmark Danish British Subject Essex Wanstead Nurseryman
Hans Rasmussen 30 Denmark Denish Northumberland Longbenton Nursery Man Florist
Hans Rasmussen 32 Denmark Danish Subject Middlesex Enfield Nurseryman
Herman Rasmussen 20 Denmark Danish Subject Essex Waltham Holy Cross Gardener Domestic
Idans Rasmussen 43 Denmark Foreign Subject South Shields So Shields Stoker Of Steam Ship
Jeno Rasmussen 30 Denmark London Shoreditch Watch Maker
Jens Rasmussen 34 Denmark Danishsuteril Newcastle Upon Tyne Jesmond Importer Commercial Agent
John Rasmussen 38 Denmark Borough Of West Ham West Ham Printer & Stationer
Ludrig Rasmussen 23 Denmark Danish Subject Hertfordshire Cheshunt Nursery Gardener
Morris Rasmussen 21 Denmark Danish Subject Essex Waltham Holy Cross Gardener Domestic
R Rasmussen 17 Stryna Denmark Devon Rok
Rasmus Rasmussen 17 Denmark Danish Subject Southampton Ordinary Seaman
Sigard Rasmussen 15 Denmark Copenhagen For Subj London St Marylebone
Signald Rasmussen 22 Denmark Of Kingston Upon Hull Holy Trinity Fisherman
Sven Rasmussen 42 Denmark London Hammersmith Distillers Chemist
V Rasmussen 16 Strib Denmark Devon Ordinary Seaman