Krøyer was born in Copenhagen and the son of Bernt Anker Krøyer and Johanne Margrethe (née Schrøder), as well as the brother of Henrik Nikolai Krøyer.
Liparis fabricii was first described in 1847 by the Danish zoologist Henrik Nikolai Krøyer.
He was raised by Gjesdal's sister, Bertha Cecilie (born 1817) and brother-in-law, the Danish zoologist Henrik Nikolai Krøyer, after his mother was judged unfit to care for him.
Henrik Ibsen | Nikolai Gogol | Nikolai Rimsky-Korsakov | Nikolai Yudenich | Nikolai Bulganin | Peder Severin Krøyer | Nikolai Timkov | Nikolai Leskov | Henrik, Prince Consort of Denmark | Nikolai Rubinstein | Nikolai Bukharin | Nikolai Volkoff | Nikolai Fraiture | Nikolai Rakov | Nikolai Pozdneev | Nikolai Eilertsen | Nikolai Berdyaev | Niels Henrik Abel | Henrik Steffens | Henrik Hertz | Fredrik Henrik af Chapman | Nikolai Ryzhkov | Nikolai Krylenko | Nikolai Glushkov | Nikolai Erdman | Henrik Shipstead | Henrik Schyffert | Henrik Nikolai Krøyer | Henrik Larsson | Henrik Jonback |