Id est and To wit

Id est adverb - That is to say; in other words.

To wit and id est are semantically related In some cases you can use "To wit" instead an adverb phrase "Id est".

To wit adverb - That is to say.

Id est and to wit are semantically related in namely topic. You can use "Id est" instead an adverb phrase "To wit", if it concerns topics such as that is to say.