Bet Is A Girls Name Of Hebrew Origin. It Is A Diminutive Of Elizabeth, Which Means "God Is My Oath." Whether You Want To Honor A Family Member Or Celebrate Your Faith, A Sweet Name Like Bet Makes A Great Choice For Baby. Bet May Also Be Derived From The Latin Name Beatrice, Meaning "blessed" Or "voyager." Wherever Life Takes You, With Baby Bet By Your Side You Can Expect Great Things To Come Your Way.