Coheiress is a see also of coheritor.
As nouns the difference between coheiress and coheritor
is that coheiress is one of several who are heiresses to an estate while coheritor is one of several who are heritors to an estate.
coheiress
English
Noun
(es)
One of several who are heiresses to an estate
coheritor
English
Noun
(
en noun)
One of several who are heritors to an estate
See also
*coheir
*coheiress