The family took its name from Preston, Lancashire, where they were prosperous merchants:
Philip de Preston,
of Preston, Lancashire,
Adam de Preston,
or de Preston,
of Preston, Lancashire.
His brothers settled as merchants in Ireland. Later he went too.
He first appears in Ireland in 1326.
He was a judge in Ireland from at least 1326 until retired 1344.
He died probably 1346.
He had issue:
Sir Robert Preston, 1st Baron Gormanston.
He mar 1stly, 1353 (her age 13) to Margaret Bermingham [born 1340].
Seat at Carbury Castle, County Kildare (inherited through his wife).
Margaret died 19 July 1361, age 21 yrs.
She was bur in Monastery of Friars Preachers, Drogheda.
He was knighted 1361.
In 1363 he purchased the manor of Gormanston (or Gormanstown), Co.Meath.
He built the first Gormanston Castle.
He died 1396.
He had issue by 1st wife:
Sir Christopher Preston, 2nd Baron Gormanston.
He mar Elizabeth Loundres [dau of William Loundres, or de Londres, Lord of Naas, Co.Kildare, by his wife Alice Leynes].
2nd Baron was accused of treason and imprisoned in 1418-1419, but soon released.
He died 1422.
2nd Baron and Elizabeth had issue:
Christopher Preston, 3rd Baron Gormanston.
He mar Jane Dartas [or D'Artois].
3rd Baron died 1450.
The "Cadaver Stone" in the Preston chapel at Stamullen, Co.Meath, may depict Jane.
3rd Baron and Jane had issue:
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