Eileen Mott
From Tardis Wiki, the free Doctor Who reference
Eileen Mott was the wife of Wilfred Mott, (PROSE: Beautiful Chaos) and therefore the mother of Sylvia Noble and maternal grandmother of companion Donna Noble.
She died sometime before 2009. (PROSE: Beautiful Chaos) Wilfred was worried that his wife might have been turned into one of the Master Race inside her grave. (TV: The End of Time)