Harrison was the eldest son of the Rev'd E W Harrison and E E Tribe of Bugbrooke, Northamptonshire where his family had owned land since the eighteenth century.
The family home, Bugbrooke Hall, is now owned by the Jesus Army.
Ranulf's third sister Agnes (Alice) inherited, along with a share in other estates with her sisters, lands between the Ribble and the Mercy rivers, Powis Castle near Welshpool in Wales, Chartley Castle, Staffordshire, and land at Bugbrooke, Northamptonshire.