In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Founded member of the royal academy of painting and sculpture?
Charles Le Brun

Who has the most atp masters 1000 titles?
Rafael Nadal

What does the o in an irish name mean?

descendant