I found this on the net about the name 'marmalade'.
Origin: There is a widespread legend that marmalade is a contraction of Marie malade. The story goes that when Mary, Queen of Scots, was ill, marmalade--then quite a rare delicacy--was one of the few things that she could eat. So, the French phrase, Marie malade, meaning 'sick Mary' came to be applied to the breakfast delicacy of the Scottish-born queen. Marmalade came into English from French at about the time of the Norman conquest. But, its origin can be traced back to antiquity. Though made of oranges and lemons, the conserve called marmalade takes its name from the Latin melimelum or honey apple, which was some variety of apple grafted on quince stock. The Latin for honey apple became the Portuguese word for 'quince'. The first marmalades recorded, in the early 16th century, were made of quinces and brought to England from Portugal. But, over the centuries, there have been plum, cherry, apple and even date marmalades.