Around 1561 [her father] Thomas Trentham (age 23) and [her mother] Jane Sneyd (age 15) were married.

Before 27 Dec 1591 Edward de Vere 17th Earl of Oxford (age 41) and Elizabeth Trentham Maid of Honour Countess of Oxford were married. She by marriage Countess of Oxford. She brought her husband a dowry of £1000 bequeathed to her in her father's will, payable at the rate of 500 marks a year for three years. He the son of John de Vere 16th Earl of Oxford and Margery Golding Countess of Oxford.

On 26 Jan 1595 William Stanley 6th Earl of Derby (age 34) and [her step-daughter] Elizabeth Vere Countess Derby (age 19) were married. She by marriage Countess Derby. She the daughter of [her husband] Edward de Vere 17th Earl of Oxford (age 44) and Anne Cecil Countess of Oxford. He the son of Henry Stanley 4th Earl of Derby and Margaret Clifford Countess Derby (age 55). He a great x 2 grandson of King Henry VII of England and Ireland.

On 28 Apr 1599 Francis Norreys 1st Earl Berkshire (age 19) and [her step-daughter] Bridget Vere Baroness Norreys Rycote (age 15) were married. She the daughter of [her husband] Edward de Vere 17th Earl of Oxford (age 49) and Anne Cecil Countess of Oxford. He the son of William Norreys and Elizabeth Morrison Countess Lincoln.