Encyclopedias, Almanacs, Transcripts, and Maps
- William Neile
- William Nicholson
- William Nicholson
- William Nicol
- William Nunn Lipscomb Jr
- William Ockham
- William of Moerbeke
- William of Saint Cloud
- William P. Lear
- William Pars
- William Paul Thurston
- William Pepper
- William Perkin
- William Petty
- William Prout
- William R. Hewlett
- William Ramsay
- William Rufus (William II of England) (ca. 1056-1100)
- William Sealy Gosset
- William Seward Burroughs