He was a cousin of Don Esteban de Iguiño (Stephen Higgins) who was Spanish General of the Infantry in the Army of Philippine islands.
[2] Sir John Higgins was born in 1678, and after the Treaty of Limerick in 1691 left Ireland to live in exile with his family at the Court of James II at St. Germaine in France.
He held the post of Chief Physician to King Philip V from 1713 until his death in 1729, receiving the substantial salary of 81.528 reales de vellón.
In 1722 Higgins received the title Councillor of Castille from Philip V of Spain, and in 1723 he corresponded Sir James Terry who was Athlone Herald to the exiled Stuarts in France and Italy regarding a confirmation of his family's Arms.
In his will, he made provisions for the welfare of his widowed mother back in Limerick, plus alms for the poor of that city to be distributed by the Catholic clergy.