It's even worse than that...
First the pronunciation of "cuil" in Irish would sound more like "quill" in English. Rhyming with the Irish word for blood - "fuil"
Secondly Finn McCuil is an Anglicisation of Fionn Mac Cumhall - which does sound like Cool but isn't anything thing to do with knowledge. Cumhall is his dad's name.
http://en.wikipedia.org/wiki/Fionn_mac_Cumhaill
Now on the other hand the Irish word "iúl" does refer to knowledge, commonly in the phrase "cuir in iúl", which roughly translates to "put in knowledge", to "let someone know". Thought I'd let someone know...
Haven't bothered trying Cuil, even if you didn't know Irish all this would turn up in a search so I wouldn't expect much from a company that can't even research their own name properly.