Transcendental names of the Lord

pancajanyam hrsikesa - Lord Krishna is referred to as Hrsikesa because He is the owner of all senses. hrsika = sense and isah = owner. The living entities are part and parcel of Him, and therefore the senses of the living entities are also part and parcel of His senses. The Lord, situated in the hearts of all living entities, directs their senses. Pure devotees of the Lord are absorbed in surrender to the Lord. In turn the Lord directly controls their senses. On the Battlefield of Kuruksetra the Lord directly controlled the transcendental senses of Arjuna, and thus His particular name of Hrsikesa.

Other names of the Lord as per Mahabharata
The word “krish” is the attractive feature of the Lord’s existence, and “na” means spiritual pleasure. When the verb “krish” is added to the affix “na” it becomes krishna, which indicates the all-attractive Absolute Truth.

Lord Krishna has different names according to His different activities. His name is Madhusadana because He killed the demon of the name Madhu; His name is Govinda because He gives pleasure to the cows and to the senses; His name is Vāsudeva because He appeared as the son of Vasudeva; His name is Devaki-nandana because He accepted Devaki as His mother; His name is Yasoda-nandana because He awarded His childhood pastimes to Yasoda at Vrndavana; His name is Partha-sarathi because He worked as charioteer of His friend Partha or Arjuna.