Viscount Weir, of Eastwood in the County of Renfrew, is a title in the Peerage of the United Kingdom.
He had already been created Baron Weir, of Eastwood in the County of Renfrew, on 26 June 1918, also in the Peerage of the United Kingdom.
[2] As of 2010[update] the titles are held by his grandson, the third Viscount, who succeeded his father in 1975.
The family previously owned Montgreenan Estate, near Torranyard, Ayrshire.
The heir apparent is the present holder's son, the Hon.