For the last two, you are probably correct. But I didn't make those up so can't say for sure.
coRNucopiA and pRAliNe have the letters for RNA in them, if that makes you feel better. And both of them give you delight. Does there need to be more than that? Did our parents think of stories or acronyms when they named us? ;)
ZARNAP - ZavolanLab RNA-seq pipeline, we could also use the shorter version:
ZARP - because that sounds nice: You: "I got some new RNA sequencing data, how can I analyze it?" Me: "Ah easy, just zarp it, it's gonna tell you all you need to know."
and I like the "Z", if this wikipedia extracts make you happy: "The Semitic symbol was the seventh letter, named zayin, which meant "weapon" or "sword"." and "⟨z⟩ is used in writing to represent the act of sleeping (sometimes using multiple z's like zzzz)" and being the last letter it implies some closure, and it reminds me of wizard ;)
Of course they won't have trademarked the name (probably wouldn't even if it were published in Nature), but it's a matter of courtesy not to use the same name in such a case, especially if it's in the exact same domain. Plus we want people to find our tool if they search for the name, not somebody else's.
Anyway, Rhea is still an option and votes for Rea/REA will be counted for Rhea