Based on the immigration to Australia, this gentlemen's name is actually "John Bowning GILBERT". Married Hannah Hilder in 1827.
John Gilbert and Hannah Hilder travelled (as immigrants) to Australia with her son John HILDER (born 1825). I don't know of any evidence to prove or disprove that John Gilbert is the father of John Hilder - we just know that John Gilbert married the mother of John Hilder.
