Returning here just to muddy the waters a little more

I’ve not yet ordered John & Barbara’s marriage cert but will be doing it in the next week or so.
However, the Lanc OPC as well as having John’s baptism (and his half brother Sylvester) has this baptism;
Baptism: 3 Nov 1900 St Mary Poor House, Ashton under Lyne, Lancashire
Josephus Walsh - filius Annae Walsh
Born: 25 Oct 1900
Godparent: Maria Halpin
Baptised By: Roberto Molloy
Register: Baptisms 1884 - 1916, Page 30, Entry 137
Source: Original Register
All of them share the same godmother so I’m wonder if this Joseph is another brother? I can’t find a birth / death record for him, though.
A little more detailed article mentions Annie was living with a man named Jas Heyes at Salford.