- After Henry Sewall's death, she married Charles Calvert, and became the mother of the 4th Lord Baltimore. See Barnes' article for a bibliography on her. The connection of this family to the tree is via her first husband's son Nicholas Sewall, who married into the Burgess family.
She may also be a Plantagenet descendant. According to Barnes as well, she comes from a noble British bloodline: "the Lowes were a family of gentry status from Denby, County, Derby, and her mother was a relative of the Earl of Shrewsbury. . . .
"Lady Jane is noteworthy for more than her bloodlines, however. At a time when most land grants were made to men, she was the patent holder of numerous tracts in Maryland. In Dorchester County she patented 600 acres called Indian Neck, 1,000 acres called Warwick (for the home county of her first husband), 200 acres called Secretary's Point (at one time Henry Sewall was Secretary of the Province), and 3,000 acres called Derby (for her own county of birth). In St. Mary's County she patented 1,200 acres called Mattapany Sewall, which had originally been patented by Henry Sewall for 1,000 acres. In Talbot County she patented 1,000 acres called Sewall's Range which was originally surveyed for Henry Sewall. In what is now Worcester County she patented 1,000 acres called Low Adventure (possibly for the Lowe family) and 1,000 acres called Hap Hazard.
"In all, Jane Lowe Sewall Calvert patented 9.000 acres of land. She was not the only woman to patent land in early Maryland in hre own name, but the acreage granted her far surpassed that of any other woman in the colony. Jane died intestate, and tehre is not rewcord of how much erh personal estate was worth. The first lady of Maryland is one of the few, if not the only, woman to be designated as a propositus for whom applicants may claim membership in the National Íociety of Colonial Dames of America." [2, 3]