Interesting. Is there any language you or the sibling have used that does this with eval, and does it find much use?
* Racket [0], sometimes used when you don't want to use Racket's way of designing DSLs, or if you want to interface to databases simpler.
* Scheme [1], used when designing DSLs, interacting with databases. You often see it go hand-in-hand with X-Expressions.
* Lua [2] can, but it is rarely used.
Note, the link for Lua actually lists a whole host of languages where this can be technically done, but not all are entirely safe.
I think it's uncommonality is not because of it's inconvenience or rarity, but rather the mantra of 'eval is evil' in the programming community, even when it doesn't apply.
[0] https://docs.racket-lang.org/guide/eval.html
[1] https://www.gnu.org/software/guile/manual/html_node/Environm...
[2] https://rosettacode.org/wiki/Runtime_evaluation/In_an_enviro...
To the second part of your question: as you have undoubtedly noticed, you've never heard of E nor Monte.