Portuguese for a quince is 'marmelo', based on a Latin word, so a jam made from these fruits was called 'marmelada'. It then came into English via French 'marmelade' as 'marmalade'. The word can be applied to any fruit jam, especially citrus ones...hence the reason it became attached to oranges especially. There's no real reason why lemon jam, say, shouldn't also be called marmalade.
No idea about the ironing-board at the moment.



