On: A tiny language called Z (2013)

[mr__y]

But then you can add ++ to the letter effectively doubling the namespace size.

[_jyog → mr__y]

or --

https://en.wikipedia.org/wiki/C--

or #

https://en.wikipedia.org/wiki/C_Sharp_(programming_language)

or prefix objective

https://en.wikipedia.org/wiki/Objective-C

[kuroikyu → _jyog]

or suffix Script, e.g. JavaScript and the bonus with this one is that it doesn't need to relate to the original language in the least! It's a win-win-win.

[mr__y → kuroikyu]

objective-[x]Script-- not related to X?

[gnulinux → mr__y]

But then that implies a relation with the language without the suffix, which is not usually true for new languages.