That's very sad. The Clancy Brother and Tommy Makem were my first introduction to Irish music in the 60s and I have most of their LPs.
One of my favorite songs that I sing now along with my fiddle is his "Rambles of Spring":

I've a fine, felt hat
And a strong pair of brogues
I have rosin in my pocket for my bow
O my fiddle strings are new
And I've learned a tune or two
So, I'm well prepared to ramble and must go.

I'll keep him in my thoughts. A great musician, songwriter, and a wonderful person. We will miss him.

S. in Seattle