Thomas Andrews was born on 7 February 1873 at Ardara House, Comber, County Down, in Ireland, to The Rt.
Hon.
Thomas Andrews, a member of the Privy Council of Ireland, and Eliza Pirrie.
Andrews was a Presbyterian of Scottish descent, and like his brother considered himself British.

His siblings included John Miller Andrews, the future Prime Minister of Northern Ireland, and Sir James Andrews, the future Lord Chief Justice of Northern Ireland.
Thomas Andrews lived with his family in Ardara, Comber.
In 1884, he began attending the Royal Belfast Academical Institution until 1889 when, at the age of sixteen, he began a premium apprenticeship at Harland and Wolff where his uncle, the Viscount Pirrie, was part owner.
Thomas Andrews was born on 7 February 1873 at Ardara House, Comber, County Down, in Ireland, to The Rt. Hon. Thomas Andrews, a member of the Privy Council of Ireland, and Eliza Pirrie. Andrews was a Presbyterian of Scottish descent, and like his brother considered himself British. 
His siblings included John Miller Andrews, the future Prime Minister of Northern Ireland, and Sir James Andrews, the future Lord Chief Justice of Northern Ireland. Thomas Andrews lived with his family in Ardara, Comber. In 1884, he began attending the Royal Belfast Academical Institution until 1889 when, at the age of sixteen, he began a premium apprenticeship at Harland and Wolff where his uncle, the Viscount Pirrie, was part owner.
Thomas Andrews