Cornélie Lydie Huygens (13 June 1848 – 31 October 1902) was a Dutch writer, social democrat and feminist.

[1][2] She was the daughter of Gerard William Otto Huygens and Cornelia Adelaide Henriette Elias (1824–1848) and married the German businessman Ignatius Bernardus Maria Bahlmann (1852–1934) in 1902.

Her mother died after her birth and she was raised by her paternal aunt Jeanne Marie Huygens, a friend of the feminist Mina Kruseman.

In 1896, she joined the newly founded Social Democratic Workers' Party (SDAP) as its first female member and the first woman in the Netherlands to be a member of a political party, becoming known as the "Red Lady".

Apparently very unhappy in her marriage, she drowned herself within a month after this wedding in a pond in the Vondelpark.