Brought up by a mother interested in literature, like her sisters Alfhilda Mechlenburg and Fanny Suenssen, she contributed articles to women's magazines and published novels and short stories.

In August 1867, she married the schoolteacher at Aalborg Cathedral School Axel Georg Juel (1822–1903) with whom she had two children: Margrethe (1869) and Elise Henriette (1871).

[2] Teckla Suenssen spent her childhood in the south of Jutland where her father was a sea captain based in Tønning.

She went on to write two long narrative poems, "Ivan Mikkel" (1860) and, using the pen mane Johan Fedder, "Den sorte Ravn" (The Black Raven, 1861).

Together with her two sisters, she contributed to the children's book of stories and verse, Ei blot til Lyst (1880) and the play En Skilsmisse (A Divorce, 1872).