John Sigismund may refer to:
- John Sigismund, Elector of Brandenburg
- John II Sigismund Zápolya, King of Hungary and Prince of Transylvania
Famous quotes containing the word john:
“The person who designed a robot that could act and think as well as your four-year-old would deserve a Nobel Prize. But there is no public recognition for bringing up several truly human beings.”
—C. John Sommerville (20th century)