well-thriven
/ˌwɛlˈθrɪvn/Now chiefly Scottish and English regional (northern )
adjective
That has grown, developed, or prospered well; thriving, flourishing. In later use chiefly of livestock.
Origin
Late Middle English; earliest use found in Cursor Mundi: a Northumbrian poem of the 14th century. From well + thriven.