"David Tweedie born about 1845 in Ireland. First appearance in Glasgow is in a marriage record where he married Ann Robertson, also from Ireland, in 1876. He was a Brickfield Labourer and his parents are listed as John Tweedie, agricultural labourer and Martha Pendleton (I don't think they came to Glasgow as there are no records on ScotlandsPeople for them). He was a Presbyterian. He died on 18 Aug 1906.
Here's my guess; I think that he and Ann Robertson came from the same part of Ireland and arrived in Glasgow together to get married and start a new life. There are other Robertsons as witnesses on the Marriage Record so it looks like other members of her family went with them."
There are births listed for that couple:
Jane Tweedie, b. 24 may 1877, Glasgow
John Tweedie, b. 16 nov 1878, Glasgow
William Tweedie, b. 2 jun 1880
Robert Tweedie, b. 1 jun 1882
David Tweedie, b. 1 jul 1884, Glasgow
Thomas Tweedie, b. 7 may 1886, Glasgow
Alexander Tweedie, b. 24 may 1888, Glasgow
James Tweedie, b. 17 sep 1890, Glasgow
Also there are two brothers listed for David Tweedy, b. 1843:
Thomas Tweedy
William Tweedy