(from con and participis, "partner") or Parceners; such as have equal portions in the inheritance of their ancestor. Coparceners are so either by law or custom. Coparceners by law, are the issue female; which, in default of a male heir, come equally to the lands of their ancestor. Coparceners by custom, are those who, by some peculiar custom of the country, challenge equal parts in such lands; as in Kent, by the custom of gavelkind. The crown of England is not subject to coparcenary.