All I know is that Krishna or Arjuna is called Hrishikesha. What is the meaning of Hrishikesha?
हृषीकेश = हृषीक (इन्द्रिय/senses) + ईश (lord) = Lord of the senses
Hindi Commentary By Swami Chinmayananda and English Commentary By Swami Sivananda on BG 1.15 explain Hrishikesha (used for Krishna) as the Lord of the senses:
हृषीकेशः (the Lord of the senses) Krishna हृषीकेश यह भगवान् का एक नाम है जिसका अर्थ है इन्द्रियों का स्वामी। हृषीक (इन्द्रिय)...
Lord Shiva gives same meaning (Lord of the senses) in in Harivamsha: Bhavisha Parva: Chapter 88: