If your relative died without a will and there was a need to probate the estate, an administrator would need to be appointed. The spouse and heirs usually have priority in being appointed to that office. Spouses can refuse their right of acting as administrator and children may or may not choose to accept the position.
Heirs other than children may be administrators or creditors may choose to accept the role as well.
But if the name of the administrator doesn’t “ring a bell,” research them to find out (if you can) what their relationship was to the deceased person whose estate they are being appointed to administrate.