The MacDiarmid's are a sept of the Campbell Clan.
Clan MacDiarmid Crest & Motto
"Honour Probatque Virtus"
WHAT DOES THE MacDiarmid NAME MEAN?
From the Gaelic Mac Dhiarmaid, which means son of Dermid.
WHERE DOES THE MacDiarmid CLAN HAIL FROM?
Alan MacDiarmid, a chemist, won the Nobel Prize in Chemistry in 2000