Dunmurry

Hi I am looking for any information on the following family:

Alexander Hunter (1787 -1878) of The Green, Dunmurry, who married Elizabeth Steen (Betsy) (1789) daughter of James Steen of Clady in Kathleen Rankin's book "Linen Houses of the Lagan Valley". Their children are listed under the Hunter Family Tree as:

• Alexander Hunter (1810)
• William Steen Hunter (1812- Aug 1863 Fitzroy Harbor, Canada West) m Anna Orr of Genalina (1815- 6 October 1896)
• Mary Hunter (1815-1892)
• James Steen Hunter of The Green, Dunmurry (1817- 10 April 1898 Bog Mills, Lisburn, Down, Northern Ireland)
• John Hunter (1826- 23 Nov 1886 Bog Mills, Lisburn, Down, Northern Ireland)

Anything greatly appreciated.