Depends upon various sects of hinduism, some belief that vishnu is eternal, some believe shiva and some that lalitha devi is eternal.
however one common term used for eternal one is saguna brahman.
by the way what is "kalpan" is it equal to 100kalpa(1 brhma life)x1000 ?
Krishna in Mahabharata,
of civilization, and entities such as Shiva, were created by Me. They
do not know of this because they are illusioned by My cosmic material
"Neither the hosts of gods nor the great sages know My origin or
opulences, for, in every respect, I am the source of the gods and
sages. He who knows Me as the unborn, as the beginningless, as the
Supreme Lord of all the worlds – he only, undeluded among men, is
freed from all sins."
but no doubt some sects may believe krishna himself was illusioned as eternal and was came from lalita-sadasiva as you say.