Hi cupoflife and Cando
William Frederick McMahon death certificate named Agnes Maria McMahon as his mother - no father. He was born in Ipswich, Queensland in 1903 so this certainly fits for the right person.
Wouldnt his mothers married name (if she married) be reflected on that document?
Do you have the death certificate or are you quoting from the INDEX? If the index states his mother as Agnes Maria
McMAHON and no father, that is what will be on the certificate.
Agnes Maria's brother Michael was born 3 Sep 1882 at Aramac and baptised 28 Oct 1883 at St Mary's Catholic Church, Ipswich.
I suggest you have a search of the parish records for possibly baptisms of Agnes's illegitimate children. Perhaps St Mary's at Ipswich may be a good place to start.
Agnes's brother's funeral notice
Queensland Times 23 Apr 1946
McMAHON Relatives and Friends of Mrs.M.J. McMAHON and FAMILY 10 Dorling-street, are Invited to attend the Funeral of her dearly beloved Husband, their Father, Father-In-law and Grandfather. MICHAEL JOHN McMAHON. to leave St. Mary’s Church. THIS (TUESDAY) AFTERNOON at 2 o’clock for the Ipswich Cemetery.
Agnes and George
MARTIN had two children Esme and a son who was born after 1914 limit of births in Qld.
I don't have time at the moment to do any research.
Cheers
Cando