What is sidneye?

Some articles on sidneye:

Wake Of The Red Witch - Plot
... grudge against shipping magnate Mayrant Ruysdaal Sidneye (Luther Adler) ... which Loring testifies that Mayrant Ruysdaal Sidneye (Luther Adler), whose trading company, Batjak, owned the ship, had sent Ralls an order relieving him of his duties ... Sidneye's brother, who is presenting the shipping company's complaint at the inquest, asks Ralls how he managed to be rescued so quickly, only twelve hours after the wreck, but before he ...