On 19 Oct 1526 [his grandfather] William Willoughby 11th Baron Willoughby (age 44) died at Parham, Suffolk [Map]. He was buried at All Saints Church, Mettingham Bungay [Map]. His daughter [his mother] Catherine Willoughby Duchess Suffolk (age 7) succeeded 12th Baroness Willoughby de Eresby. Catherine Willoughby Duchess Suffolk (age 7) became a ward of Henry VIII (age 35).

On 19 Sep 1580 [his mother] Catherine Willoughby Duchess Suffolk (age 61) died. Her son Peregrine Bertie 13th Baron Willoughby (age 24) succeeded 13th Baron Willoughby de Eresby. [his wife] Mary Vere Baroness Willoughby Eresby by marriage Baroness Willoughby de Eresby.

She was buried at St James' Church, Spilsby [Map] with her second husband [his father] Richard Bertie Baron Willoughby (age 63). Elizabethan Period. Sideboard Tomb. Cornice supported by three figures of a monk and two wildmen, each holding aloft a shield of arms. In the frieze are flowers, fruit and escutcheons.

Mary Vere Baroness Willoughby Eresby: she was born to John de Vere 16th Earl of Oxford and Margery Golding Countess of Oxford. On 25 Dec 1577 Peregrine Bertie 13th Baron Willoughby and she were married. She the daughter of John de Vere 16th Earl of Oxford and Margery Golding Countess of Oxford. He the son of Richard Bertie Baron Willoughby and Catherine Willoughby Duchess Suffolk. Around 24 Jun 1624 Mary Vere Baroness Willoughby Eresby died.

On 09 Apr 1582 [his father] Richard Bertie Baron Willoughby (age 65) died at Bourne. He was buried at St James' Church, Spilsby [Map].

On 17 Jan 1600 [his sister-in-law] Katherine Vere Baroness Windsor (age 60) died.

On 25 Jun 1601 Peregrine Bertie 13th Baron Willoughby (age 45) died at Berwick on Tweed [Map]. His son [his son] Robert Bertie 1st Earl Lindsey (age 18) succeeded 14th Baron Willoughby de Eresby. He was buried at St James' Church, Spilsby [Map].

On 15 Feb 1610 [his daughter] Catherine Bertie (age 15) died in childbirth. She was buried at St James' Church, Spilsby [Map].

Monument Elizabethan Period. Tall Sideboard Tomb with reclining hooded figure of Lady Katherine, daughter of Peregrine, with Chrisom Child in the crib at her feet. Above a standing figure of Peregrine Bertie 13th Baron Willoughby (age 45) in a niche, with strapwork embellishments, all supported on composite columns with a dentilated cornice.

Catherine Bertie: Around 1595 she was born to Peregrine Bertie 13th Baron Willoughby and Mary Vere Baroness Willoughby Eresby. Sources are confused about her birth year stating she was born in 1610 and that she married in 1609. Date adjusted to around 1595 on the assumption she was married around twenty years of age. Her son died at six days old on 09 Feb 1610. Her father died in 1601. Sources also refer to her as Baroness Rockingham whereas she died some eleven years before her husband was created Baron Rockingham. In 1609 Lewis Watson 1st Baron Rockingham and she were married.

Around 24 Jun 1624 [his former wife] Mary Vere Baroness Willoughby Eresby died.