Marblethorpe, in the Calceworth Wapentake of Lincolnshire, comes from a likely Continental Germanic male personal name Malbert and Old Norse þorp ‘a secondary settlement, a dependent outlying farmstead or hamlet’.
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Find out about Mablethorpe, Lincolnshire.
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Kenneth Cameron, A Dictionary of Lincolnshire Place-Names. Nottingham: English Place-Name Society (1998), p. 85.