Margaret de Quincy was the widow of John de Lacy and an heiress of the Quincy family. The Ingoldmells property was held by her second husband Walter Marshal in her right after John's death.

The legal nature of her interest is not fully specified in the cited account.

Research sources:
- W. O. Massingberd, Court Rolls of the Manor of Ingoldmells in the County of Lincoln, 1902, Introduction, pp. xi-xii. — https://en.wikisource.org/wiki/Page%3AMassingberd_-_Court_Rolls_of_the_Manor_of_Ingoldmells_in_the_County_of_Lincoln.pdf/11
- Wikipedia biographical reference — https://en.wikipedia.org/wiki/Margaret_de_Quincy,_Countess_of_Lincoln