Isonymic relationships in the parish of Fylingdales, North Yorkshire, in 1851.

Lasker 's coefficient of relationship by isonymy was used to analyse surname data taken from the 1851 Census returns for Fylingdales parish, North Yorkshire. At this time the population had a thriving maritime economy based on the coastal town of Robin Hood's Bay, as well as agricultural and some industrial activity inland at Thorpe , Raw and Stoupe Brow. There is a marked heterogeneity in the distribution of surnames within the parish, with both place and profession constraining isonymic relationships. Within-group kinship is high among the mariners , fishermen and shipowners of Robin Hood's Bay and Thorpe , and the relationship between these different maritime groups is also very high. Kinship is generally far lower both within and between the land-based occupational groups, and between these and the seafarers .