Dūdelninkas (m)
plural: Dūdelninkaīany person who plays some kind of bagpipe (&c.)
Considering its suffix (~kas) and its link with the main term in the internet source, this seems to be a synonym of Dūdininkas; NB: Moreover, the expression "Nustok tu, dūdelnyke!" [Stop you, piper (?)] seems to justify this impression.