That's correct Alan. Enesel S.A. is the Pireaus trading arm of London-Greek shipowner N.S. Lemos & Co. Ltd. Lemos has a long history in tanker and dry/tramp shipping but containerships are a more recent venture. The 13,000 teu ships are on 10 year charters to Evergreen, an operator which has tradionally owned all of it's larger ships rather than gone out to the charter market. Perhaps the combined traditions of both companies has contributed to the unusual scenario of these ships retaining their owner's livery and name style, rather than that of the operator.
Incidentally, the remaining ships in the series will be named, respectively:
Thalassa Eldida
Thalassa Avra
Thalassa Niki
Thalassa Mana
Thalassa Tyhi
Thalassa Doxa
Thalassa Axia
Brgds
Phil