vayu. Vayu - the god of wind is hanuman's father so his surname would be vayu
vayu
vayu
Hanuman is the son of Vayudeva. Pawan is another name of Vayu. Hence Hanuman is known as Pawan putra or Vayu putra. Hanuman became the best servant of Rama and helped in the war against Ravana who abducted Sita.
Vayu Bhavan
arjun
VAYU is what you call air in sanskrit.
VAYU
Bayu (Vayu) means "air" or "God of Wind" in Hindu religion.
vayu or the god of wind gives the gandiva ( bow ) to arjun
Vayu the wind deva(devas are not forms of God but carry out God's orders)is his father.Bheema the Pandava is his half brother(When Kunti got a secret boon to get a child she asked Vayu for a child and that small child was Bheema.) So I guess in a way the Pandavas are his cousins even the not all the Pandavas are sons of Vayu(Yuddhishtra-Yama) (Nakula and Sahadeva-Ashwin Kumar) (Arjuna-Indra)
Vayu Naidu has written: 'Hiss, don't bite!' -- subject(s): Folklore, Snakes, Bengali (South Asian people), Juvenile literature 'Magic vessels' -- subject(s): Folklore 'Hiss Don't Bite (Under the Banyan Series) (Under the Banyan)'