The great majority of Strangers in the UK can be traced back to Devon, and in particular to Holne, and this is probably also true of Strangers elsewhere in the world (where not of Scandinavian or Germanic origin and hence pronounced Strang-er). There have been (and probably still are) a few pockets of Strangers in London and the South East of England who have not yet been connected to the Devon Strangers. As previously noted, it seems likely that most or all of the Strangers in Australia and New Zealand can be traced back to the Richard Stranger (1785-1869) who moved his family to Guernsey around 1835 and from where several of his children and near relatives later emigrated to Victoria, Australia between 1853 and 1854. And other Strangers emigrated to the United States and Canada around the same time, including my 2nd great grand uncles Thomas Stranger (born 1829) and his brother John Stranger (born 1831).
One Stranger who is almost certainly connected to the Devon Strangers (although we do not yet know how) is the John Stranger (born 1774, Talland, Cornwall, died 1849, East Looe, Cornwall) who married a Susanna Debell (c.1776-1858) and was a draper and grocer in East Looe. One of his daughters, Elizabeth, married a John Pethybridge and their children and grandchildren became successful solicitors and bankers in and around Bodmin. It is known that John was son of a Joseph Stranger (c.1747-1811) and his wife Elizabeth (nee Couch) and it is quite likely that Joseph was another of the Devon Strangers, but a link has not yet been made. It is also not known if there was any connection with my 2nd great grandfather Richard Stranger's move to Talland.