The term "Twin Heart" refers to the two heart-shaped pendants, and "Y-Drop" specifies the style of the necklace chain, which descends in a Y-shape, often creating an elegant and elongated look. The addition of "Initial Necklace" emphasizes the personalized aspect of the jewelry, where the hearts feature engraved or inscribed initials.

This name effectively describes a necklace design that combines a Y-shaped drop chain with dual heart pendants, showcasing personalized initials, making it a meaningful and stylish accessory.