Sources

Eadartoin Songs and Poems, Rob Donn ii, 1899, 422
etərtən: Diack Ms2276
Eadardun: Watson in Dwelly

Eadardan, with accent on eadar. The traditional explanation is eadar-dun, between forts. In confirmation of this view may be adduced the various brochs referred to below and the hill fort of Strathrory. The name applies especially to the part near the old church, now the U.F. Church, which stands on the left bank of Edderton Burn: Watson 1904, 23

Forms for Edderton Farm:

Baile nam Foitheachan: Watson in Dwelly
G. baile na foitheachan (final “‘a’ open). The formation of ‘foitheachan’ seems parallel with that of Guisachan, etc., and suggests as the base ‘ faidh,’ a beech, which in Scottish Gaelic is ‘ faidhbhile,’ beech-tree. The name would thus mean Place of beeches.: Watson 1904, 25