The City of Cockburn wants to split Banjup�s north into a new suburb bounded by Armadale Road to the south, Jandakot Road to the north, Warton Road to the east and Solomon Road to the west.
The rest of Banjup to the north of Jandakot Road and east of Fraser Road would be included within the suburb of Jandakot.
At its August council meeting the city voted to advise the Geographic Names Committee (GNC) that �Treeby� was its first choice for the name of the new suburb.
Joseph and Emma Treeby settled in the area in the 1890s and three of their sons served in World War I.
Steve Treeby, the great-grandson of Jo-seph and Emma, said he was shocked when informed the Banjup Residents Group was looking to put the family name forward.
�I asked the other members of the family and they were very humbled,� he said.
�It puts us on the map, but in reality it�s not us, it�s the ancestors who were the pioneers.
�They put in the hard yards so this would be awesome.�
After public consultation, the city appeared to be favouring the name �Quendalup�, a Nyungar term meaning place of the bandicoot.
But an alternative put forward by councillor Steve Portelli, with the name Treeby as the first priority and Quendalup as second choice, got the nod.
The name also has support from Jandakot MLA Joe Francis.
Councillor Stephen Pratt voted in favour of Quendalup, a name put forward by the Aboriginal Reference Group and generally supported by affected landowners.
Mr Portelli said many of those were from Stockland�s Calleya development and had not been exposed to the history of the area.
The GNC will consider the names before coming back to the city.