From wikipedia:
“Shortly after its discovery, Neptune was referred to simply as "the planet exterior to Uranus" or as "Le Verrier's planet". The first suggestion for a name came from Galle, who proposed the name Janus. In England, Challis put forward the name Oceanus.[28]
Claiming the right to name his discovery, Le Verrier quickly proposed the name Neptune for this new planet, while falsely stating that this had been officially approved by the French Bureau des Longitudes.[29] In October, he sought to name the planet Le Verrier, after himself, and he was patriotically supported in this by the observatory director, François Arago. However, this suggestion met with stiff resistance outside France.[30] French almanacs quickly reintroduced the name Herschel for Uranus, after that planet's discoverer Sir William Herschel, and Leverrier for the new planet.[31]”
OK forget about Poseidon since it was not proposed. Let’s just take the four propositions:
IANOS(Janus) = 10 + 1 + 50 + 70 + 200 = 331
NEPTYNE(Neptune English style) = 50 + 5 + 80 + 300 + 400 + 50 + 5 = 890

LE BERRIER(Le Verrier) = 30 + 5 + 2 + 5 + 100 + 100 + 10 + 5 + 100 = 357

and now we have:

OOKEANOS(Oceanus) = 70 + 70 + 20 + 5 + 1 + 50 + 70 + 200 = 486

NEPTAN(Neptune Greek style) = 50 + 5 + 80 + 300 + 1 + 50 = 486

POSEDAN or POTEDAN => NEP+TAN

PATER(father) = 80 + 1 + 300 + 5 + 100 = 486

PETRA(rock=> Peter) = 486

which whould you choose and why?


>>Are you implying that these ancient references refer to the planet that we know as Neptune that, as I keep mentioning, wasn't discovered until 1846, and nearly got called by another name ... ??<<
The planet Neptune was known to some at ancient times by that name(the Roman name is Greek in origin) and as Oceanos(see above). Since it was not visible to the naked eye it could have been mixed up – by the uninitiated with a star – non planet blue in color. This is a possibility – I don’t know.