how can i verify if my great grand mother changed her name from , emma robinson b 1865,to avera georgina may matusky b 1862 ,prussia , mother avara nee corney. married william john armstrong at kawakawa newzealand 1882 , nz b d m ref 1882/180 .
her son john thomas birth cert ref 1885/5209 ,states mother nee matusky b prussia .
john thomas gets married ,ref 1907/5068 , states mother nee robinson .
i have many dna matches linked to emma corney b 1834 married newzealand 1852, george robinson b1817 , had a daughter emma b 1865 but disappeared from history .???