Lilibet Is A Feminine Hebrew Name Meaning "God Is My Oath” And Is Derived From The Hebrew Root Elisheba Of The Same Meaning. Lilibet Was Most Commonly Used As A Nickname But Has Become A Popular First Name In Recent Times. Most Notably, Prince Harry And Duchess Of Sussex Meghan Named Their Baby Lilibet In Honor Of Queen Elizabeths Childhood Nickname. Lilibet Is A Sweet And Unique Variation Of The Traditional Elizabeth, Providing A Lovely Option For Naming Baby.