According to Strathearn School website: "Strathearn House was built in the 1864, on eighteen acres of land at Belmont, by William Mullan'. It is highly likely the streets with the name Strathearn are called after this house/estate. The name Strathearn Lane Off Circular Road was proposed by Carn Properties and approved by the Health and Environmental Services Committee, on Monday, 11th August, 2003.