The barony of Dalziel was granted to Hugh de Dalziel around 1288.
In the 18th century the Hamiltons of Dalzell acquired the property of Browncastle although I haven’t been able to ascertain how. James Hamilton of Browncastle, a son of James Hamilton of Dalzell, died in 1788.
Alternative names for Dalzell House
Dalyell; Dalzell Castle; Dalziel House