Anna Sophia Herbert was born in around 1610, the daughter of Philip Herbert, 4th Earl of Pembroke and Lady Susan de Vere, the youngest daughter of the Elizabethan courtier, poet, and playwright, Edward de Vere, the 17th Earl of Oxford.G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume III, page 44.
