cuppatom on Family Tree Circles

Hi, my grandfather is JACK HIPKIN who married my grandmother MELVA LORIS neeLUDERS both are now deceased, there children are LORIS, LENA and HAROLD. HAROLD is my father who prefers to be called MARTIN. LORIS has two girls, LENA has three boys and dad has two girls and two boys. I know that grandad moved to New Zealand from England but i don't know when, i have grown up in New Zealand.

I would like to know my family tree, did grandad have any brothers and sisters. I would like to go back in the family tree as far as possible. I do know somewhere in the family tree our name changed from HIPKINS to HIPKIN does anybody know why.