Margaret Grimbaldeston (née Whitehead; 1544 – ????) was the 12th great-grandmother of Cometan, classified as one of Cometan’s distant maternal ancestors in the Prescott family line. Born in Kirkham, Lancashire, Margaret was baptised on 27th February 1544 and her father is recorded as Hugh Whitehead.
In Cometanic ancestry, Margaret is classified as part of the 14th generation retrograde, thus categorising her as a distant ancestor of Cometan.