That exalted god Vrishadhvaja (Siva) honoured him with a joyous heart. That deity is called Rudra by the Brahmanas and therefore Skanda is called the son of Rudra.
अर्चयामास सुप्रीतो भगवान् गोवृषध्वजः। रुद्रमग्निं द्विजाः प्राहू रुद्रसूनुस्ततस्तु सः॥