Katherine Keats-Rohan in her Domesday Descendants, p. 270 doesn't give Amice (or Avice) any connections or other name, and only mentions 2 sons from her marriage to Roger de Albini; William de Albini pincerna, and Nigel de Albini of Mowbray.
The Mowbray connection comes in because their son Nigel, married as his first wife, Matildis de Aquila (Matilda d'L'Aigle) and her first husband had been Robert de Mowbray, Earl of Northumberland. Robert de Mowbray was exiled in 1096 and Nigel was granted the lands known as the Honour of Mowbray. (Also from Domesday Descendants, pp. 269 & 284)
It looks like Burke has decided that Mowbray was inherited, rather than a grant, and made Amice a Mowbray to explain how her son Nigel gained those lands?
I would go with Unknown as her LNAB