"Over yonder" is a casual phrase that's used to indicate the general direction or location of a place or thing, usually accompanied by a finger pointing in a rough direction.
Not according to my mom. Growing up "over yonder" or "in yonder" was the location of the thing I needed to grab for her....no direction was specified.
"Go grab the thing for me in yonder"
"Where?"
"In yonder"
"WHICH YONDER???"
Alright, you've convinced me