The eldest of the Kunti's sons was called Yudhisthira, the second was named Bhimasena and the third was named Arjuna.
ज्येष्ठं युधिष्ठिरेत्येवं भीमसेनेति मध्यमम्। अर्जुनेति तृतीयं च कुन्तीपुत्रानकल्पयन्॥