Also Pascal and Haskell. R is named partly after its initial developers, Robert Gentleman and Ross Ihaka (https://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-is-

Also Pascal and Haskell. R is named partly after its initial developers, Robert Gentleman and Ross Ihaka (https://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-is-R-named-R_003f https://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-is-R-named...). Erlang is named after the mathematician Erlang, but also as an abbreviation for "Ericsson Language".