The Lydian theonym mariwda-
Word mariwda-
a d w i r a m
Meaning theonym, dark
See also Linear B: mo-ri-wo-do ‘lead (metal)’

Comments
See 'Graeco-Anatolian Contacts in the Mycenaean Period'

myk. mo-ri-wo-do 'lead' completely meets the conditions: There is an underlying adjective */morku-io-/ dark, as in the Lydian theonym mariwda(s)-k the dark ones. The phonological development */morku-io-/ > */maruido-/ > */mariudo-/ with a transition from */ViV/ > /VdV/ proves molubdos/mo-ri-wo-do to be a loanword from
Lydian; the semantic development from blue, dark (sc. Metal) to lead is unproblematic.