Since playing DoW2, one particular name/scheme caught my eye, that of the Lugganath.

The Lexi ( notes "It has ties with the Harlequins, for the Lugganath Eldar hope to abandon this galaxy, starting a new civilization within the webway." and cites both the 5th Edition Rulebook and the 4th Edition Eldar Codex, but after looking at both, I couldn't find any more info on them other than a Starmap showing their location in Ultima Segmentum.

So, does anyone else have any other information on these?