And I do now have the baptismal record of Thomas Legall Yates (son of Edward Vernon and Mary Yates!), baptised in Kingston, Jamaica on 9 July 1753, and born there on 24 June (PR, Baptisms, I, 116). It's extremely likely that his mother was Mary Legall, daughter of Nicholas and Elizabeth (nee Wade) Legall, born and baptised Kingston, 10 February 1734.
Likewise, Edward Vernon Yates is probably the naval officer of that name, son of Charles and Catherine (nee Vernon) Yates, born in Redmile, Leicestershire in 1729. More to follow!
Yes this is true! This started the Yates bloodline when a Yates married into the royal Vernon family so i'm thinking in order for a Yates to marry a Vernon Charles Yates had to be of royaly as well. Correction this did not start the Yates bloodline i was only able to trace the Yates bloodline to Charles Yates 1701-born however... His mother was Martha Martin with would be my 8th great grandmother.