The premise that there is an influence from Celtic mythology on modern musical traditions is a dangerous one and will not support research of much weight. As Malcolm Douglas has pointed out above, most references are neologistic and it should also be noted that the jump from mere reference to real influence is a large one.

At the level of reference, a true report of Irish song material over the last few centuries would declare that Helen and Venus are referenced much more often than Deirdre, who would be the most common native reference.

Whether Deirdre counts as a reference to myth is another point of doubt. The jump from legendary material to mythological material is also a large one, even where some of the legends have "mythological undertones".

I would be surprised if this research were to come up with any instances of direct and continued influence of mythology on Irish song. The few possibilities (and please note only possibilities) are a number of lullabies which contain repetitions of formulae seeking to protect the child from the Badhbh/Bodb or other mythological creature which might carry it away in the night. The composed and pseudo-learned reference to Aoibheall in the Gartan Mother's Lullaby is a calque on more genuine and authentic folk repetitions of this type of motif. One which survives and may possibly be genuine is in Habha ín mo leanbh which is easiest and most authentically sourced in recordings of Sorcha Ghuairim (Folkways one time, later re-issue by Cló Iar-Chonnachta; and, a separate issue from Gael Linn) . There are a few others of the same ilk. It is possible that a greater number have been "collected" in Scotland and Carmina Gadelica will provide many comparisons.

Other than that area, I am afraid the influence is not of Celtic Mythology but of the mythology of Celtic mythology. The researcher should set her computer to quick-type neo-, pseudo- and quasi-.

FF