Quick answer
Mildred is a girl name with Old English roots meaning "gentle strength".
Meaning and history
This name comes from the Old English name Mildþryð meaning "gentle strength", derived from the elements milde "gentle" and þryþ "strength". Saint Mildred was a 7th-century abbess, the daughter of the Kentish princess Saint Ermenburga. After the Norman Conquest this name became rare, but it was revived in the 19th century.
Notes and context
Usage: english