Thanks Geoff.
Barony fits and 1st son George and 2nd daughter Margaret fits.
Possibly this one:
William Armstrong & Elizabeth Muir
3 Dec 1854 Gorbals, Lanark
??
Elizabeth Muir
Christening Date 19 Aug 1838
Christening Place , OLD MONKLAND, LANARK
Birth Date 16 Jul 1838
Father's Name William Muir
Mother's Name Isabella Hutchison
??
Elizabeth Muir
Christening Date 29 Aug 1837
Christening Place , DOUGLAS, LANARK
Birth Date 20 Aug 1837
Father's Name William Muir
Mother's Name Isabella Greenshields
There are others but not with parents who would fit the naming pattern.