Our Lady of Dorleta is venerated at Leintz-Gaztaga (Euskadi), a village well known for its salt-works.
Dorleta comes from the Basque
dorla, name of the square used to obtain salt (near the sanctuary there are these squares). The suffix
-eta is not a diminutive, but a locative "place of" (as in Zelaieta, e.g.): "place of
dorlas".
You can have more information at:
http://www.euskaltzaindia.com/eoda/izenak.asp?onoma=izenak&hizkuntza=eu&testua=dorleta (Basque)
http://www.euskaltzaindia.com/eoda/izenak.asp?onoma=izenak&hizkuntza=es&testua=dorleta (Spanish)
Lumia
http://onomastica.mailcatala.com