The motto of the house is, “When All Is Darkest.” The only member of the house to appear is Eddison Tollett, called Dolorous Edd, a squire and sworn brother of Night’s Watch. He appears to have been from a lesser branch of the house, as he speaks of being raised in a crude house such as the poorer of the smallfolk might have.
Information about House Tollett that reveals spoilers from the books.