None other is your relative, not your father, your mother, your brother nor your sister. When you die, nothing accompanies you but your kamma . Whomever you call your relatives remain here, but your kamma continues to follow you from one life to another. You are not in possession of anything but your own kamma. It is your only companion.
Refuge is only in one's own kamma.
No other being can give you refuge. Your own kamma gives you refuge. Nobody can protect you, not even a Buddha. Refuge in Buddha is refuge in the quality of Buddha, the enlightenment, the teaching that he gave. By following the teaching, you can develop enlightenment within you.