Jean-Baptiste Loeillet (John of London 1680-1730) was a Baroque composer born in Belgium. He played flute, oboe, and harpsichord. There are at least three composers named "Loeillet". They are brothers and cousins each other. He moved to London, so he is called as "John of London". Their works have been sometimes confused. Brian Priestman has written an index of their works based on his research.