पुरञ्जयस्तस्य सुत इन्द्रवाह इतीरितः ।
ककुत्स्थ इति चाप्युक्तः शृणु नामानि कर्मभिः ॥ १२ ॥
puram-jayah-Puranjaya ("the conqueror of the residence"); tasya-his (Vikuksi's); sutah-son; indra-vahah-Indravaha ("he whose carrier is Indra"); iti-thus; iritah-known as such; kakutsthah-Kakutstha ("situated on the hump of a bull"); iti-thus; ca-also; api-indeed; uktah-known as such; srnu-just hear; namani-all the names; karmabhih-according to one's work.
The son of Sasada was Puranjaya, who is also known as Indravaha and sometimes as Kakutstha. Please hear from me how he received different names for different activities.