Prince Frederick Augustus, Duke of York and Albany, Earl of Ulster (1763-1827), no accession to the throne
Heir Presumptive to the Throne 1820-1827
Second son of King George III (1738-1820), House of Hanover, and Sophie of Mecklenburg-Strelitz (1744-1818). Became heir presumptive upon his brother's accession as King George IV on 29 January 1820; died before accession to the throne (5 January 1827). Married Princess Frederica Charlotte of Prussia (1767-1820) in 1791, no issue. Next in line: his younger brother William Henry.