Irma Marie Rouelle was born in 1845 in France. She was the second wife of Leon Charles Francois Clerc and they had two children during their marriage.
The family lived at 56 Prentis Road.
Leon was a lamp manufacturer, refiner, distiller and importer of a range of products, including petroleum. Owner of the Pharos Chemical Works, Hackney. He was also Secretary of the French Chamber of Commerce