Grays Court is situated off the lower section of Grays Lane and is named after the Gray family whose residence was Graymount, a Regency house built c. 1835 by Thomas Jackson for William Gray, a linen merchant and director of the Ulster Railway Company. The building still exists and is occupied by Hazelwood Integrated College. (Thanks to Dr Stiofán Ó Direáin for this information).
The name Graymount is retained in street-names on the north side of Grays Lane, such as Graymount Road, Graymount Parade, etc.