joint heirship or ownership
• (n.) Partnership in inheritance; joint heirship; joint right of succession to an inheritance.
Co·par'ce·na·ry (ko*pär'se*na*rȳ) noun ; plural Coparcenaries (-rĭz). [ Prefix co- + parcenary ] (Law) Partnership in inheritance; joint heirship; joint right of succession to an inheritance. 
1) Joint ownership. 2) An estate that is jointly inherited, in equal shares, from a single ancestor.
a special kind of joint ownership arising esp. under common law upon the descent of real property to several female heirs.