These would explain why various references refer to him as a Polish musician.

Kayanis is a Polish musician and composer of ambient electronic music, neo-progressive and symphonic rock.

She collaborates with some of the best Polish musicians, including the great bass player Wojciech Pilichowski.

Traditionally the chairman of the board is a Polish musician:

A tribute album by Polish musicians.

Several famous Polish musicians took part in the recording of the album.

Maurycy Stefanowicz (br 1976), is a Polish musician and guitarist.

Several programs are also targeted at Polish musicians.

Anna Maria Jopek is a Polish musician and singer.

In jazz music, Polish musicians created a specific style, which was most famous in 60s and 70s.