Glendalough is a Perth suburb. It was named after the old monastery of Glendalough in Ireland. The name means 'valley of the two lakes' and it is significant that Glendalough in Western Australia is situated between Galup and Herdsman Lake. Glendalough succeeded the old Bibbulmun name Goobabbilup. There was a red wilgi (ochre) pit in this vicinity which her father had given to Fanny Balbuk, and she claimed payment for any wilgi taken from her Wilgigarup.