Name, year and country of birth, from Birth search on New Zealand BDM website in June 2018:
1887/5142. McGregor, William Charles. Mother: Kate. Father: Charles

Year and country of marriage from Marriage search on New Zealand BDM website in June 2018:
1924/5993. Bride: Beryl Mavis Siddle. Groom: William Charles McGregor

New Zealand Electoral Roll - Auckland Central General Roll for 1911, found in June 2018:
McGregor, William Charles, 2 Canada Street. cabinetmaker
McGregor, Charles Grove, 2 Canada Street. carpenter [Father]
McGregor, Catherine Jane, 2 Canada Street. married [Mother]
McGregor, George, 2 Canada Street. settler [Brother]

New Zealand Electoral Roll - Auckland Central General Roll for 1914, found in June 2018:
McGregor, William Charles, 2 Canada Street, cabinetmaker
McGregor, Charles Grove, 2 Canada Street, carpenter [Father]
McGregor, Ethel, 2 Canada Street, spinster [Sister]

New Zealand Electoral Roll - Auckland Central General Roll for 1919, found in June 2018:
McGregor, William Charles, 2 Canada Street, cabinetmaker
McGregor, Charles Grove, 2 Canada Street, carpenter [Father]