Probably named after Ardgowan Castle and Ardgowan House in Renfrewshire, Scotland. Ardgowan Castle is a tower house built in the late 15th century. Ardgowan House is a late 18th century mansion. The estate has belonged to the Stewart family since the early 15th century.
There are other instances of the name Ardgowan Street in Paisley, Greenock and Port Glasgow.
“On application of the owners, your Committee have named the following new streets: ... one off Woodstock road, ‘Ardgowan street’; ... ” Minutes of the Town Improvement Committee, 28th July 1897.
"Submitted application, dated 3rd inst., from Mr. Henry McKibbin, that the name Ardgowan Drive be approved for a new street on his property off Euston Street. In view of the fact that the new street referred to is a continuation of Ardgowan Street, the Committee were of opinion that the new portion should also be named Ardgowan Street, and referred the matter to the City Surveyor to deal with". (9th December 1930).