Frode Andresen
Frode Andresen( born 9 September 1973) is a former Norwegian biathlete and cross- country skier.
Anaïs Bescond
Anaïs Bescond( born 15 May 1987) is a French biathlete and non-commissioned officer.
Lucien Engelen
Lucien Engelen( born Lambertus Johannes Lucia Pierre Gerard, 2 July 1962) is the director of the Radboud REshape Innovation Center.
Fritz Fischer (biathlete)
Friedrich" Fritz" Fischer( born 22 September 1956) is a former biathlete from Germany.
He won a gold medal with Germany in the 4 × 7.5 km relay in the 1992 Winter Olympics.
After ending his competitive career Fischer served as a coach for the German biathlon team for many years before retiring in 2014.
Lambertus Johannes Hansen
Lambertus Johannes Hansen( 12 August 1803, Staphorst – 21 April 1859, Amsterdam), was a 19th- century Dutch painter.
Lambertus Johannes Toxopeus
Lambertus Johannes Toxopeus (1894 - April 21, 1951) was a Java-born, Dutch nationality lepidopterist.
He mainly worked in Indonesia then known as the Dutch East Indies and specialised in the families Lycaenidae and Hesperiidae.
Wikispecies provides a list of key works online here He died in Bandung, Java.
Lars Berger
Lars Berger( born 1 May 1979) is a former Norwegian biathlete and cross- country skier.
Tora Berger
Tora Berger( born 18 March 1981) is a retired Norwegian biathlete and Olympic champion.
Bert Broer
Lambertus Johannes Folkert" Bert" Broer( 17 January 1916 – 1991) was a Dutch physicist and mathematician.
Kendall Gretsch
Kendall Gretsch( born 2 April 1992) is an American female triathlete, biathlete and cross-country skier.

Question: Did Fritz Fischer (Biathlete) and Lambertus Johannes Toxopeus share the same nationality?
Answer: no