"Blend of Lydia and Ann"
The name Lydiann is commonly a female name from the "English" origin.
Lydiann is a compound given name built from Lydia and Ann, following the same pattern as Joann, Marianne and Rosann. Lydia is the Greek name of a region in Asia Minor that was used as a personal name, and Ann is the English form of Hannah. The joined spelling Lydiann is recorded in United States birth records from 1958.
The pronunciation of Lydiann is LID-ee-an.