No relation.
MeTV viewers are most likely to remember Linville (who, by the way, was of no relation to M*A*S*H actor Larry Linville) from her starring turn in a provocative tale from The Twilight Zone, “The Passerby,” a Civil War story that cast her as a mansion owner on a road trafficked by soldiers.
https://www.metv.com/stories/rip-joanne-linville
I haven't remembered it for 30 or more years