This may or may not relate but I have found this entry on the passenger lists on FindMyPast.

Mr & Mrs Geo. E. PHELPS and infant

Occupation: farming

Ages 29, 26 and 1

Departure date: 28 June 1906

Port of departure: London

Destination port: Fremantle

Ship: Omrah

The age of George is right as born in 1876 but suggests if it is the same George he was
married and had family before he left England.