THANKS Felipa, here are links to performances and information about some of the songs you have looked up in the DT
MAY MORNING DEW
“ As they tramped through the heather, the wild hare to pursue,
And their joys they would mingle in the May morning dew. ”

Siobhan Miller - May Morning Dew    https://www.youtube.com/watch?v=1ciXa7_d4Ys
The May Morning Dew · Alison Mcmorland & Peta Webb    https://www.youtube.com/watch?v=-L-Tq6aIfiw
May Morning Dew - Dolores Keane    https://www.youtube.com/watch?v=w5Zq8t_-DV4
Eamonn MacDonncha - The May Morning Dew    https://www.youtube.com/watch?v=YH4LnahqIxk
Mainly Norfolk song info     https://mainlynorfolk.info/frankie.armstrong/songs/themaymorningdew.html

THE QUEEN OF MAY
Shirley Collins - The Queen of May   https://www.youtube.com/watch?v=LE6JWijSMgg
MUDCAT DT:Lyrics   /mudcat.org/@displaysong.cfm?SongID=4845BR>

MAY DEW
Derek & Dorothy Elliott - May Dew    https://www.youtube.com/watch?v=J_uHkr-6Y-I