Person:Elizabeth Beard (21)

That William Meekin married a daughter of Robert Beard is demonstrated though Beard's will (naming son-in-law William Meakin) and land records (listing "Meakin, William and wife, Beard, Daughter" holding Beard's Choice in 1707). However, whether the daughter's name was Elizabeth or Margaret is evidently based on interpretation of the will, which lists, per the most commonly displayed abstract (from Maryland Calendar of Wills, Vol. 1):

Beard, Robert, St. Mary's Co., 18th Mch., 1683; 7th Aug., 1685. To grandsons William and Robert Meakin and hrs., 300 A., 3 tracts, viz., “St. Margaret's Field,” “St. Margaret's Forest,” and “Speedwell,” equally at 21 yrs. of age. In event of death of either without issue, survivor to inherit deceased's portion. To daus. Margaret and Eliza: Meakin and hrs., sd. lands in event of death of grandsons afsd. without issue. To son (unnamed) of brother Christopher, 50 A., “Beard's Choice,” if he come into Md. within 10 yrs., otherwise to revert to grandsons William and Robert afsd. Dau. Margaret and son-in-law William Meakin, exs. and residuary legatees. Test: Richd. Edelen, Jno. Davis, Jno. Blakely. 4. 178.

Robert did have a granddaughter Elizabeth Meekin, but this text seems to point to daughters Elizabeth Meekin (married to William) and Margaret (who, with William, acted as executor).