Definition of Eleemosynarius

In old English law, an almoner, or chief officer, who received the eleemosynary rents and gifts, and in due method distributed them to pious and charitable uses.

The name of an officer (lord almoner) of the English kings, in former times, who distributed the royal alms or bounty.

That's the definition of Eleemosynarius in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.