Priscilla married to Mathew Grant was not daughter of Sir Anthony Grey of Burbage/Burbeck, Leicestershire, England.
Reverand Sir Anthonys daughters:
*Priscilla 1 born 1609 not 1602 died before 17 May 1615 when Priscilla 2 was born
*Priscilla 2 Married John St Nicholas and died before him 16 September 1665. Her husband died 21 May 1698.
This is all included on the Church Monuments in her father's parish church. The inscription dates totally eliminate the possibility that Mathew Grant could have married the daughter of Anthony Grey.