Sir Patrick MacChombaich de Colquhoun QC (/kəˈhuːn/ kə-HOON; 13 April 1815 – 18 May 1891) was a British diplomat, legal writer and sculler who influenced early Cambridge rowing. Colquhoun was the son of James Colquhoun and the grandson of the Patrick Colquhoun who was Lord Provost of Glasgow. He was educated at Westminster and St John's College, Cambridge. In 1837 he won the Wingfield Sculls and in the same year instituted the Colquhoun Sculls at the University of Cambridge. Colquhoun married Katherine de St Vitalis. Their daughter married Sir James Redhouse.