Viscount Monson of Castlemaine
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The title of Viscount Monson' of Castlemaine was created once in the Peerage of Ireland on 23 August 1628 for William Monson, who was degraded from the title in 1661.
[edit] Viscount Monson (1628)
- William Monson, Viscount Monson (1607-1678) (degraded 1661)
