The entry on anacletus says it means "invoked" but it fails to address the full etymology... Here is a script I got on quick search to find what Cletus mant exactly;
it was known that 'cletus' = 'called' and that 'Anacletus'
would be analyzed as 'ana' + 'cletus', two pertinent possibilities from
different meanings of 'ana' are 'called upwards' and 'called against'
but ana- was even easier to know (that was what hinted me that if "anacletus" meant invoked "cletus" probably does mean "called" as "invoked" also derives from a prefix that has a meaning similiar to "in-" and a lexem "vok-" that has a meaning similiar to "call" because I bet it is related to the Spanish "boca" which means "mouth")...
Ana- can be found in such words as anabaptism from M.L. anabaptismus from L. anabaptismus "second baptism", from Late Gk. anabaptismos, from ana- "up (in place or time), back again, anew" (see ana-) + baptismos "baptism"
or
any word opposed to a word with the preffix cata... like analysis (here an example of the word catalysis)
catalysis
1650s, "dissolution," from Gk. katalysis "dissolution, a dissolving" (of governments, military units, etc.), from katalyein "to dissolve," from kata- "down" (or "completely"), see cata-, + lyein "to loosen"
ana-
before verbs an-, prefix meaning 1. "upward," 2. "back, backward, against," 3. "again, anew," from Gk. ana- "up to, toward, exceedingly, back, against," from ana "up, on, upon, throughout, again," cognate with O.E. on, from PIE root *ano- "on, upon, above"