Sixtus I

[ siks-tuh s ]
/ ˈsɪks təs /

noun

Saint, pope a.d. 116?–125?.

Also Xystus I.

Sixtus II

or Xystus II

noun

Saint,died a.d. 258, pope 257–258.

Sixtus III

or Xystus III

noun

Saint, pope a.d. 432–440.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019