Fredericka Marie Caroline Johanna (Milhan) Brooker was born on August 17, 1855 and died in 1946. She was the daughter of Johann and Marie (Möller) Milhan.

She was married to Christian Charles Brooker on July 23, 1879. At the time of her sister, Wilhelmina (Milhan) Rambow's death in 1936, Caroline was living in Dundee, Michigan.