What is Court Of Orphans?

Legal Definition
In English law. The court of the lord mayor and aldermen of London, which has the care of those orphans whose parent died in London and was free of the city. In Pennsylvania (and perhaps some other states) the name "orphans' court" is applied to that species of tribunal which is elsewhere known as the "probate court" or "surrogate's court"
-- Black's Law Dictionary
Legal Definition
A court for the care of orphans and their property.
-- Ballentine's Law Dictionary