Query about the position of the adverb, relative clause and its the conjunction & its punctuation…
1a. He won the respect even of his enemies.
1b. He won the respect of even his enemies.
2a. He won the respect even from his enemies.
2b. He won the respect from even his enemies.
Which is/are grammatically correct?
Do they all have the same meaning?

3a. They murdered all they met (，？？)whom they supposed to be gentlemen.
3b. They murdered all they met, and whom they supposed to be gentlemen.
3c. They murdered all they met, they supposed them to be gentlemen.
3d. They murdered all they met those were gentlemen they supposed to be.

Which is/are grammatically correct?
Do they all have the same meaning?

Question

Query about the position of the adverb, relative clause and its the conjunction & its punctuation…
1a. He won the respect even of his enemies.
1b. He won the respect of  even his enemies.
2a. He won the respect even from his enemies.
2b. He won the respect from even his enemies.
Which is/are grammatically correct?
Do they all have the same meaning?

3a.  They murdered all they met (，？？)whom they supposed to be gentlemen.
3b.   They murdered all they met, and whom they supposed to be  gentlemen.
3c.  They murdered all they met, they supposed them to be gentlemen.
3d.   They murdered all they met those were gentlemen  they  supposed to be.

Which is/are grammatically correct?
Do they all have the same meaning?

Answer

1a, 1b, 2a, 2b are all correct and mean the same thing in the usual context. There is technically a very slight difference between 1 and 2, which is only relevant in very rare contexts - so rare it's barely worth mentioning. They practically always mean the same thing.

3 - they are all a bit different. 3a & 3b are technically valid. 3c wants a dash or semi-colon instead of a comma - it's currently sloppy grammar with that comma but not strictly wrong. 3d has multiple issues of unequivocally wrong grammar.