My sister is the genealogist in our family. She has traced one branch back to 862, when "Knut the Kulmer" landed in England. We think, but cannot confirm, that he was from Denmark. After a number of generations, the family took the surname Culmer, and went to Broadstairs, where one of them carved the stairs in the cliff. If any of the Culmers there is interested in the data I have, I'm willing to share.