To give a straightforward explanation of what is alluded to here, Loglan didn't have y originally, and bare cmene were legal vocatives. Some people used r as a hesitation noise, and pc proposed that this was actually an invocation of the god of hesitation (see also ki'ai). As a result, R was introduced into the Pantheon of Loglan Gods.
Any relation to Abel is purely coincidental...
May be related to the DFA (Deterministic Finite Automaton). See Lojbanic Qabbalah. *sigh*
Also "Schwa"--a key figure in Postmodern Ufology.