Malone, Dumas. Jefferson the Virginian. Boston: Little, Brown, & Co., 1948. See Appendix IC, "Children of Peter Jefferson (Feb. 29, 1707/08-Aug. 17, 1757), and Jane Randolph (February, 1720-Mar. 31, 1776)."
It may be possible to confirm family relationships with Jane by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Jane:
I was recently contacted by another researcher, who stated that Jane Davis and Jemima Jane Davis are not the same and that Jane Davis, daughter of Peter Jefferson and Jane Randolph died unmarried in 1765. Further research is needed.