Belvoir Street was previously known as Lovers Lane. It may be named after Belvoir, a house built in the mid-18th century and demolished in 1961. It stood where the main car park for Belvoir Forest Park is today. See Belvoir Drive etc. for further details of this house. However, this was several miles away from Ballymacarret. Much closer to hand was a house named Beaver Hall, which appeared on the 2nd edition OS 6" map, and was spelt Belvoir Hall in BPU 1866 / 1868. It seems to have been demolished some time between 1884 and 1901. Given that Belvoir Street was built very close to the site of Beaver / Belvoir Hall, it is much more likely that this local house account for the street name.
"Submitted letter, dated 26th ult., from Councillor McBride, drawing attention to the fact that there is a small street from Newtownards Road to Albertbridge Road with two names, one end of the street being known as Belvoir Street and the other end Glenallen Street" and requesting that the street be named as one. Resolved – That, subject to the owners of property agreeing thereto, the entire street be known as Belvoir Street". (10th July 1928).
"The City Surveyor reported relative to the replies which he had received from owners of property or agents therefor in Belvoir Street, on the proposal to change the name of Belvoir Street to Glenallen Street, in view of the fact that Belvoir Street is a continuation of Glenallen Street, but as only eight owners of property were agreeable to the proposed change, four objected, and a reply had not been received from one owner, the Committee decided not to take further action in the matter". (18th March 1931)