What is To Wit?

Legal Definition
A phrase meaning "the following comes to mind." The phrase is sometimes used to introduce examples for a more general statement. It may follow a comma, or form the beginning of a new sentence. A colon usually separates this phrase from the examples that it introduces.

See Viz.
Legal Definition
That is to say; namely; scilicet; (q. v.) videlicet. (q. v.)
-- Bouviers Law Dictionary
Legal Definition
To know, that is to say, namely. See Scilicet.
-- Bouviers Law Dictionary
Legal Definition
That is to say; namely; scilicet; videlicet.
-- Black's Law Dictionary