Christiana de Swinburne

Cristiana, daughter of Adam de Swinburne married firstly Robert Mautalent, of Howick, near Alnwick, Northumberland. [This marriage has been overlooked by most genealogists]. By Robert she had a son John Mautalent. Robert died some time after 1296 and Cristiana married secondly, John de Widderington (died at Bannockburn 24 June 1314). By John, she had two sons, Sir Gerard de Widderington (d. 1362) and Roger de Widderington (d. 1372).

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https://www.thepeerage.com/p39755.htm#i397542 has her husband as Roger:

 Christiane Swinburne was born in 1279.1 '''She married Roger de Widdrington'''.1

Child of Christiane Swinburne and Roger de Widdrington
Roger de Widdrington+1 b. 1306, d. 1372
Citations
[S1916] Tim Boyle, "re: Boyle Family," e-mail message to Darryl Roger Lundy, 16 September 2006. Hereinafter cited as "re: Boyle Family."

https://www.stirnet.com/genie/data/british/ww/widdrington01.php has her husband as John:

Sir John de Widdrington of Widdrington (a 1304)

	m. Christiana de Swinburne (dau of Adam de Swinburne of East Swinburne)