Alexander Holcroft (December 2, 1641 – c. 1688) was the 10th great-grandfather of Cometan, classified as one of Cometan’s distant maternal ancestors in the Cottam family line. Born in Standish, Wigan, Lancashire, Alexander is recorded as having married Elizabeth Dickson (or Diconson) and as having raised at least one son named Thomas Holcroft. An exact place of death for Alexander remains unknown although he did die at the age of forty-seven. His parents were Thomas Holcroft and Alice Dickson.

In Cometanic ancestry, Alexander is classified as part of the 12th generation retrograde, categorising him as a distant ancestor of Cometan.

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