Mealsechlainn Ó hEodhasa, Irish poet, died 1504.
Mealsechlainn was a brother of Ciothruaidh Ó hEodhasa, who died in 1518.
The Annals of the Four Masters record his death in 1504:
Melaghlin, the son of Ahairne O'Hussey ... died.
See also
Aengus Ó hEodhasa, poet, died 1480. Giolla Brighde Ó hEoghusa, poet, 1608–1614. Gemma Hussey, Fine Gael TD and Minister, 1977–1989.
References https://www.ucc.ie/celt/published/T100005E/