There are 2 brothers called John TICKNELL and I think they have been confused
1. John William Thomas Ticknell born 23/5/1874
2. John Ticknell born 26/8/1876
There are birth records for the 2 boys so definetely not the same person,
It is more probable that the first child died young (before 1876) and the second child should be the one that married and had children.
