1Kathryn Warner, Edward II: Alice de Toeni and Juliana de Leyburne (17 Mar 2007).
URL = http://edwardthesecond.blogspot.com/2007/03/alice-de-toeni-and-juliana-de-leyburne_17.html.
"Alice de Toeni (or Tony or Tosny or Tosni) was born in 1283 or 1284, so was the same age as Edward II. Her father Ralph, or Raoul (1255-1295) was Lord of Flamstead in Hertfordshire; her mother Mary's parentage is unknown, but her paternal grandmother Alice was the daughter of Humphrey de Bohun, earl of Hereford (great-grandfather of the earl of Hereford of Edward II's reign). The de Toeni family came over to England with William the Conqueror. . . .
Alice's first marriage, to Thomas de Leyburne (or Leyburn or Leybourne), took place sometime around 1300. The marriage produced one child, Juliana, born in 1303 or 1304. Thomas was the son of William, first Lord Leyburn, who outlived his son and died in 1310. Thomas himself - about whom I know practically nothing, sadly - was dead before 30 May 1307, so Juliana was the sole heiress of her grandfather William. Her inheritance comprised extensive estates in Kent and Sussex. . . .
The widowed Alice made an excellent second marriage in early 1309: to Guy Beauchamp, earl of Warwick, arguably Edward II's most implacable enemy. Guy was probably born in 1272, succeeded his father William Beauchamp as earl of Warwick in 1298, and was the younger brother of Isabel, wife of Hugh Despenser the Elder.
. . .
Guy and Alice's marriage was extremely fruitful. They had two sons and five daughters, in about six and a half years of marriage. Guy's heir, Thomas, later earl of Warwick, was born in February 1314 and (presumably) named after Guy's friend and ally, Thomas, earl of Lancaster. There was a younger son, John, who played a large role in the Hundred Years War, carrying the royal standard at Crecy in 1346, and daughters Maud, Emma, Isabel, Elizabeth and Lucia. All the children lived long enough to marry. (Either Alice was perpetually pregnant, or some of her children were multiple births).
Guy died at the age of forty-three in August 1315; rumour had it that he was poisoned by Edward II for his role in Gaveston's death, but modern historians give the story little credence.
On or shortly after 26 October 1316, Alice married, as her third husband, William la Zouche de Mortimer, Lord of Ashby in Leicestershire, a distant cousin of Roger Mortimer. William was a younger son and had been a retainer of Guy Beauchamp; he is assumed to have been born about 1280, and there's no evidence I know of that he had a wife before Alice. Their son Alan, William's heir, was born on 15 September 1317, and they also had a daughter, Joyce, born about 1318 or 1320. Altogether, Alice bore ten children to her three husbands. . . .
Alice de Toeni de Leyburne de Beauchamp la Zouche (!!), countess of Warwick, died on 1 January 1324, three years before the end of Edward II's reign, aged forty or just under."