Marquess Drogheda
Marquess Drogheda is in Marquis and Marquess Ireland.
In Jul 1791 Charles Moore 1st Marquess Drogheda (age 61) was created 1st Marquess Drogheda. Anne Seymour-Conway Marchioness Drogheda by marriage Marchioness Drogheda.
On 22 Dec 1822 Charles Moore 1st Marquess Drogheda (age 92) died. His son Edward Moore 2nd Marquess Drogheda (age 52) succeeded 2nd Marquess Drogheda, 7th Earl Drogheda, 9th Viscount Moore of Drogheda, 9th Baron Moore of Mellefont in Louth.
On 06 Feb 1837 Edward Moore 2nd Marquess Drogheda (age 66) died unmarried. His nephew Henry Seymour Moore 3rd Marquess Drogheda (age 11) succeeded 3rd Marquess Drogheda, 8th Earl Drogheda, 10th Viscount Moore of Drogheda, 10th Baron Moore of Mellefont in Louth.
On 25 Aug 1847 Henry Seymour Moore 3rd Marquess Drogheda (age 22) and Mary Caroline Stuart-Wortley-Mackenzie Marchioness Drogheda (age 20) were married. She by marriage Marchioness Drogheda. They were third cousins. He a great x 4 grandson of King Charles II of England Scotland and Ireland. 
On 29 Jun 1892 Henry Seymour Moore 3rd Marquess Drogheda (age 66) died. Marquess Drogheda extinct. His second cousin once removed Ponsonby William Moore 9th Earl of Drogheda (age 46) succeeded 9th Earl Drogheda, 11th Viscount Moore of Drogheda, 11th Baron Moore of Mellefont in Louth.