The islands have a population of about 275. The only settlement is Edinburgh of the Seven Seas (known locally as "The Settlement of Edinburgh" or, more common, just "The Settlement"). The only religion is Christianity, with denominations of Anglican and Roman Catholic. The current population is thought to have descended from 15 ancestors, eight males and seven females, who arrived on the island at various times between 1816 and 1908. The male founders originated from Scotland, England, The Netherlands, the United States and Italy and share just eight surnames: Glass (Scottish), Green (Dutch), Hagan (Irish), Lavarello (Italian, a typical Ligurian surname), Patterson (Scottish), Repetto (Italian, another typical Ligurian surname), Rogers (English) and Swain (English).