Peter Nielsen may refer to: Sports. Peter Nielsen (footballer) (born 1968), Danish footballer. Peter Nielsen (sport shooter) (1890–1972), Danish Olympic shooter; see Shooting at the 1912 Summer Olympics – Men's 50 metre pistol. Peter Heine Nielsen (born 1973), Danish chess grandmaster. Peter Meinert Nielsen (born 1966), Danish road bicycle racer. Others. Peter Nielsen (actor) (1876–1949), Danish film actor. Peter Nielsen (botanist) (1829–1897), Danish botanist, mycologist and plant pathologist. Peter E. Nielsen, Danish biochemist and inventor of Peptide nucleic acid.
https://en.wikipedia.org/wiki/Peter_Nielsen