The name Whitman is a boy's name of English origin meaning "white man". Whitman and is often added to lists like Poet Baby Names and discussed in our forums with posts like "Southern CAF".
From the experts:
Whitman, a namesake surname for poet Walt, would be much more suited to a boy, probably because of that "man" part. Whit or Witt makes an uplifting short form which can be used on its own.