Bristol-based cancer and leukaemia charity CLIC is merging with Sargent Cancer Care for Children.
The charity, which was set up 30 years ago, says the merger will help it offer more and better services.
CLIC - Cancer and Leukaemia in Childhood - was set up by Bob Woodward after his son, Robert, died of cancer.
Sargent was set up in 1967 in memory of conductor Sir Malcolm Sargent who died of cancer. He worked for the BBC Symphony Orchestra for seven years.
The new name of the charity has yet to be announced.