Did preston smith brooks marry his daughter?

No, he did not.

his wives were Caroline Harper Means and Martha Caroline  Means, a cousin of his first wife. His wifes were one or six years younger than he was, so they could not possibly be his daughters.

Sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532. i found this information on wikipedia