Hi Stephan
As you already know, Louis Le Warner Hamon married 15th April 1920. He was aged 53 and a Comte (Count), living in St Helier but born in Dublin. His occupation was given as "celibalaire", whilst his father was listed as William Le Warner Hamon, a "rentier".
Katie Florence Mena Hartland nee Bilsborough was aged 37 and a widow. She was born in Liverpool the daughter of Thomas Bilsborough, also a "rentier".
Source: Marriage certificate, index entry Jersey Registry Marriages, Jul 1919 to Sep 1922, page 29.
Stewart