The Roman Map of Britain Elconio vicinity of Ventonleague or Lelant Church?

Elconio (R&C 3) next

   After M492's crossing at Eltabo, another encounter with the river Hayle (El-) seems likely in the vicinity of Ventonleague SW5738. Elconio would also be near Connor Downs, recently Conerton and as Conartone 1084. Ekwall doubts that Connor is an old river name, Dour Conor c.1540. The Connor joins the Red River east of Gwithian. Conartone could be the same as Combretouio and Condate meaning 'confluence', in this case a river junction.
    Elconio, as a scribal simplification of Elconnio, offers the possibility of a mis-read original *El-counio ' Hayle-harbor'. Celtic *counos, more often found as *caunos - I, MI cuan 'harbour'; Norse köfn, German hafen, English haven. Ptolemy II 3 14 lists an island off the south-eastern coast of Britain of a very similar name, Counnus.

ADS Record ID - NMR_NATINV-424685
HAYLE; PENWITH; CORNWALL; BIVALLATE HILLFORT, EARTHWORK, ROUND; IRON AGE SW 5564 3713
ADS Record ID - NMR_NATINV-424728
HAYLE; PENWITH; CORNWALL; INHUMATION CEMETERY; IRON AGE SW 5660 3845

    "[T]he graveyard of Lelant parish church may preserve the rectangular outline of a Roman fort well placed to control access to the estuary. " p.17  Cornwall and Scilly Urban Survey - Historic characterisation for regeneration - Hayle by Bridget Gillard & Kate Newell 2005 HES REPORT NO. 2005R077 HISTORIC ENVIRONMENT SERVICE © Cornwall County Council 2005
    If so, the fort might well have born the name Elcounio 'Hayle Harbour'. Lelant parish church graveyard SW 547 377