The plant family Hydrangeaceae was named and described by Barthélemy Charles Joseph Dumortier in Analyse des Familles de Plantes in 1829. As you can tell, the family was named after the genus Hydrangea.
As of 11-27-21 when this page was last updated, Plants of the World Online lists 8 accepted genera in this family. I only have experience with an old Hydrangea behind the kitchen of the mansion when I lived in Mississippi and Deutzia scabra.
For more information about this family of plants, please click on the links below. The links take you directly to the information about the family.
This Deutzia scabra was planted here by my grandparents likely in the late 1950’s or 1960’s. It is still alive and well.