CC Ādi 1.76

eka-i vigraha kintu ākāre haya āna
aneka prakāśa haya, ‘vilāsa’ tāra nāma
Synonyms: 
eka-i — one; vigraha — form; kintu — but; ākāre — in appearance; haya — is; āna — different; aneka — many; prakāśa — manifestations; haya — appear; vilāsa — pastime form; tāra — of that; nāma — the name.
Translation: 
But when the numerous forms are slightly different from one another, they are called vilāsa-vigrahas.