Rose Rathdonnell – aunt of William – is world famous for her sculpted marble and cast bronze frogs, wildlife and busts.
Sculpture

Sasha Sykes – sister in law of William – married to Tom Sykes, well known writer and journalist, and a mother of two,  has her own business Farm21 that designs furniture using natural resources and Perspex
Farm 21

Turtle Bunbury – brother of William – is an historian and writer of three Vanishing Ireland books as well as other subjects is based at Lisnavagh Estate with his wife Ally and their children.
Turtle Bunbury

Andrew Bunbury – brother of William – is based in Co. Down where he does landscape architecture for Parkhood Architects.  He is married to Nicola and have two children.

Lord and Lady Rathdonnell – parents of William – live on Lisnavagh Estate in a newly built house since 2006.  They lived in and managed Lisnavagh House from the early 1960s to 2006. The estate was largely operated as a farm during this time with day to day input from Andy Verney, and supplemental income coming in from house lets, bed & breakfast accommodation, holiday cottages and opening the gardens.