Simplify the following text for a Grade 6 native English-speaking person.
Original: Born in London and descended from an old Norfolk family , Gresham was one of two sons and two daughters of Sir Richard Gresham , a leading London merchant , who for some time held the office of Lord Mayor , and who for his services as agent of Henry VIII in negotiating loans with foreign merchants received the honor of knighthood .
Simplified: He was born in London in an old Norfolk family , he was the son of Sir Richard Gresham and had one brother and two sisters .