Marquess Drogheda is in Marquis and Marquess Ireland.
In July 1791 Charles Moore 1st Marquess Drogheda [aged 61] was created 1st Marquess Drogheda.
On 22nd December 1822 Charles Moore 1st Marquess Drogheda [aged 92] died. His son Edward [aged 52] succeeded 2nd Marquess Drogheda, 7th Earl Drogheda, 9th Viscount Moore of Drogheda, 9th Baron Moore of Mellefont in Louth.
On 6th February 1837 Edward Moore 2nd Marquess Drogheda [aged 66] died unmarried. His nephew Henry [aged 11] succeeded 3rd Marquess Drogheda, 8th Earl Drogheda, 10th Viscount Moore of Drogheda, 10th Baron Moore of Mellefont in Louth.
On 25th August 1847 Henry Seymour Moore 3rd Marquess Drogheda [aged 22] and Mary Caroline Stuart-Wortley-Mackenzie Marchioness Drogheda [aged 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 29th June 1892 Henry Seymour Moore 3rd Marquess Drogheda [aged 66] died. Marquess Drogheda extinct. His second cousin once removed Ponsonby [aged 46] succeeded 9th Earl Drogheda, 11th Viscount Moore of Drogheda, 11th Baron Moore of Mellefont in Louth.