Joan married Máel Mórda mac Muirecáin UÍ FÁELÁIN rí Airthir-Liphi, son of Muirecán mac Diarmata UÍ FÁELÁIN rí Laigin and Unknown, before 891. (Máel Mórda mac Muirecáin UÍ FÁELÁIN rí Airthir-Liphi was born before 861 and died in 917 in the Battle of Cennfuait, , Ireland.)