Well I know its there, because I've written about it more than once!
In the olden days of home microcomputers, there was a fruit naming tradition. As well as Apple, there was Apricot, Tangerine and so on. As a sort of homage to those days, the computer was named Raspberry.
Now for the Pi - in the early development stages, the system was to be a relatively "simple" microcontroller running a version of the Python programming language in a similar manner to the old home micros running BASIC, and as Raspberry Python is a bit of a mouthful, it became Raspberry Pi.
Things have changed since then, but the name stuck.
As for the database errors, the system is taking a caning at the moment, for obvious reasons and there isn't the time to migrate to a bigger server. Once the Pi has launched, we are told that there WILL be a move to a bigger server and "better" software.
Patience, mon brave!
I'm just a bouncer, splatterers do it with more force.....