John Mercer b 23-1-1852 married Jannet McQuarrie and had 7 kids 1880 to 1895.
John Mercer b 1862 Married Sarah Lamming and had 11 kids.
John Thomas Mercer b 17 Dec 1862 has no listing in marriages.His parents are Henry Mercer and Louisa Grace Cock (Cox on marriage record)married 13 June 1860 at registry Office , Wellington, District DAL Book 42 page 192. Henry was 23 and Louisa 18 years old.Fathers names William Cox and Henry Thomas Mercer.
Henry and Louisa had four children listed
Elizabeth Ann and John Thomas were twins born 17 Dec 1862. Near Wellington, Book 28 pg 152. District WEL
Nicholas b 12 12 1864 Near Wellington, District WEL Bk34 pg 101
William Henry born 11 Mar 1861, Bugle Ranges, District Mount Barker, Bk22 pg115
DEATHS Elizabeth Ann, Johns twin sister died on 17-4-1863, age 4 mths, at Wellington, Bk 16 Pg 167