One verse

Srimad Bhagavatam 9.6.19

9.6.19

जित्वा पुरं धनं सर्वं सश्रीकं वज्रपाणये । प्रत्ययच्छत् स राजर्षिरिति नामभिराहृत: ॥ १९ ॥

jitva param dhanam sarvam sastrikam vajra-panaye pratyayacchat sa rajarsir iti namabhir ahrtah

jitva
conquering
param
enemies
dhanam
wealth
sarvam
everything
sa-strikam
with their wives
vajra-panaye
unto Indra, who carries the thunderbolt
pratyayacchat
returned and delivered
sah
that
raja-rsih
saintly king (Puranjaya)
iti
thus
namabhih
by names
ahrtah
was called.

After conquering the enemy, the saintly king Puranjaya gave everything, including the enemy’s riches and wives, to Indra, who carries a thunderbolt. For this he is celebrated as Puranjaya. Thus Puranjaya is known by different names because of his different activities.