Witold Silewicz (born 18 May 1921 in Rajsko, Poland - died 26 January 2007 in Vienna) – Polish-Austrian composer and Double bass player, probably best known for his instrumental arrangement of the Happy Birthday to You tune for Woodwind Quintet.
Witold Silewicz (* 18. Mai 1921 in Rajsko, Polen; † 2. November 2007 in Wien) war ein polnisch-österreichischer Komponist und Kontrabassist. (de)
Witold Silewicz (né le 18 mai 1921 et mort le 26 janvier 2007) est un compositeur, chef d'orchestre et contrebassiste polonais-autrichien. (fr)
Witold Silewicz (born 18 May 1921 in Rajsko, Poland - died 26 January 2007 in Vienna) – Polish-Austrian composer and Double bass player, probably best known for his instrumental arrangement of the Happy Birthday to You tune for Woodwind Quintet. (en)
Witold Silewicz (ur. 18 maja 1921 w Rajsku, zm. 26 stycznia 2007 w Wiedniu) – polsko-austriacki kompozytor i kontrabasista. (pl)