en_tn/gen/23/19.md

After this

"After he bought the field"

the cave of the field

"the cave in the field"

the field of Machpelah

"the field in Machpelah"

that is, Hebron

Possible meanings are 1) Mamre was another name for Hebron or 2) Hebron was formerly called Mamre or 3) Mamre was very near the larger city of Hebron, so people usually called it Hebron.