Araragi is a family surname that normally refers to Koyomi Araragi. It could also be used to refer to his other family members, such as:
- Karen Araragi, his athletic younger sister, once poisoned by a wreathe-fire bee.
- Tsukihi Araragi, his intellectual younger sister, actually an immortal phoenix.
- The Araragi Matriarch, the mother of the siblings.
- The Araragi Residence, the family home.