THE DRUID TREES

Rowan...Luis
Birch...Beth
Ash...Nion
Elder...Ruis
Blackberry...Muin
Holly...Tinne
Alder...Fearn
Willow...Saille
Hazel...Coll
Oak...Duir
Ivy...Gort

In addition, here are other names which may be of interest:
FIR...Ailm
PINE...Ochtach
POPLAR...Eadha
YEW...Idho