Who first used the word "homomorphism" to describe a link between two similar structures ?
Following this, who specialized this concept with the words:
- "Isomorphism";
- "Endomorphism";
- "Automorphism" ?
Gérard Lang



Who first used the word "Homomorphism"?
According to Jeff Miller's [Earliest known uses of Some of the Words of Mathematics](http://jeff560.tripod.com/mathword.html "Earliest Known Uses of Some of the Words of Mathematics"), 



> 
> HOMOMORPHISM is found in English in 1935 in the Duke Mathematical Journal [OED].
> 
> 
> 


A [Google search](https://books.google.com/ngrams/graph?content=homomorphism&year_start=1931&year_end=1940&corpus=15&smoothing=3&share=&direct_url=t1%3B%2Chomomorphism%3B%2Cc0) for dates gives the same result.


**UPDATE**
Thanks for your comments. After a [more extended dates search](https://books.google.com/ngrams/graph?content=homomorphism&year_start=1850&year_end=1940&corpus=15&smoothing=3&share=&direct_url=t1%3B%2Chomomorphism%3B%2Cc0), it appears that the word was in use in the mid 18th century, then disappeared from screens for more than 50 years!


[This](https://www.google.ie/search?q=%22homomorphism%22%20mathematics&lr=lang_en&dcr=0&tbs=lr:lang_1en,cdr:1,cd_min:1/1/1850,cd_max:12/31/1878,sbd:1&tbm=bks&ei=KqxXWqqBAcSdkwWD04aAAQ&start=10&sa=N&biw=1366&bih=656&dpr=1) kind of search seems to output results dating back to 1869, but I stand a bit suspicious regarding what you get by clicking on them.


