Located near North Queen Street, this street is probably named from Sea View Cottage, first recorded in 1814. This was a different house from Sea View, situated a little further out on Shore Road, which gave its name to Crusaders F.C. football ground and two other streets: Seaview Drive and Seaview Gardens.
Note that Seaview Close is situated off Parkmount Street and not off Seaview Street, which is nearby.
In 1835 a Mr. Simms was resident at Seaview-cottage (Matier’s Belfast Directory). He was a partner in the book publishing and stationery business Simms & McIntyre operating at 20, Donegall Street.