Sarah & Anna are kind of like twins who develop their own language. Someone (I'm guessing Sarah) started calling Henry "Hen-a-ree-ah" (yes, it rhymes with diarrhea). This, thankfullly, turned into "Henreek" and then that morphed into calling Henry "Sen-teek." That doesn't even make sense but that's what they call him (when they're not calling him "Hen-honk," "Hen-roy," or "Hen-a-reek-ah." Sarah is "Sair-yeek" and Anna is "Anne-yeek."