i dont know either., :)
Many authors have and do write sonnets, they do not come from a single source.
Lawrence McDonald has written: 'Songs and sonnets' -- subject- s -: Sonnets
Edward Jones has written: 'Milton's sonnets' -- subject(s): Bibliography, English Sonnets, History and criticism, Sonnets, English
Mary York Sampson has written: '52 sonnets' -- subject(s): American Sonnets
Margarette A. Hoard has written: 'Ten sonnets and other verses' -- subject(s): American Sonnets
Paul Edmondson has written: 'Shakespeare's sonnets' -- subject(s): English Sonnets, History and criticism
Murray Linwood Marshall has written: 'Representative Spenserian sonnets' -- subject(s): English Sonnets
Rheinhart Kleiner has written: 'A trilogy of sonnets for Edwin B. Hill' -- subject(s): American Sonnets, Poetry
Herbert Scholfield has written: 'Sonnets of Herbert Scholfield' -- subject(s): Accessible book 'Sonnets of Herbert Scholfield'
Samuel Waddington has written: 'English sonnets by poets of the past' -- subject(s): Accessible book, English Sonnets 'A century of sonnets' 'Some views respecting a future life' -- subject(s): Future life, Immortality 'The sonnets of Europe' -- subject(s): English poetry, Sonnets, Translations
Merrill. Bishop has written: 'Sonnets in a hospital'