Background
Dalzell was the youngest son of Lieutenant-General Robert Alexander Dalzell, 6th Earl of Carnwath, and Andulusia Browne.
Dalzell was the youngest son of Lieutenant-General Robert Alexander Dalzell, 6th Earl of Carnwath, and Andulusia Browne.
Together they had the following children:
Amelia Andalusia Dalzell (died 15 August 1850)
Robert Harris Carnwath Dalzell, 11th Earl of Carnwath (1 July 1847 - 8 March 1910)
Lady Mary Isabella Dalzell (1850 - 5 February 1936)
Arthur Edward Dalzell, 13th Earl of Carnwath (25 December 1851 - 9 March 1941)
Lady Charlotte Emma Maud Dalzell (born 1859), married 25 February 1882, Colonel Sir Lancelot Rolleston of Watnall Hall. Dalzell died on 19 October 1878 aged 62. To recognise this, his other children were raised to the rank of children of an Earl by Royal Warrant of Precedence in 1889.