User blog comment:Master Sima Yi/Assassinews 31-03-'15 — Assassin's Creed Chronicles announcement trailer/@comment-413232-20150509034911/@comment-4975789-20150509180559

Jacob is a common enough name now (or at least Jake is, I know at least 3 from the top of my head), and I can't imagine that people had wildly different names 100 - 200 years ago than they do now. Heck, look at Connor, George, CHARLES LEE, William, Thomas, John, et al from over 200 years ago in AC3.