The suburb is named after Edward Granville Theodore (1884–1950), a Queensland premier and deputy Prime Minister.

[2] The main street through the suburb is named after Sir Lawrence Wackett KBE, DFC, AFC, who is widely regarded as the "father of the Australian aircraft industry".

A place of this type is rare in the ACT and highly valued by the Ngunnawal people as evidence of the importance of the artefact grinding process and the surrounding area to their ancestors.

Deakin Volcanics cream rhyolite is in high south east parts.

Quaternary alluvium is in the north lower parts, washed off the surrounding slopes.