Joseph was born about 1861, son of Joseph Martin and Ann Cooper
Joseph Cooper Martin married Anne Jane Corbett on 18 April 1895 at the Reformed Presbyertin Church, Dromara, Down, Ireland. Fathers Alexander Corbett and Joseph Martin, both farmers. Witnesses Adam Martin & Maggie McClune. 
Sarah Anne Martin (1896– )
John Alexander Martin (1897– )
Joseph Samuel Martin (1900–1902)
James McCullagh Martin (1901– )
Jane Agnes Martin (1903–1992)
On 31 March 1901 the Martin family lived in Benrow, Leitrim, County Down.  Joseph Martin (40) Farmer & Anne J Martin (36) with Sarah A Martin (5), John A Martin (3) & Joseph S Martin (1), all Church of Ireland.
On 2 April 1911 the Martin family lived in Benrow, Leitrim, County Down. Joseph Martin (50) Farmer & Anne Jane Martin (47) with Sarah A Martin (14), John Alex Martin (13), James Mccullagh Martin (9) & Jane Agnes Martin (7), Irish Church. Married 16 years, 5 children born / 4 living.