Wikipedia
Lord Lyon (horse)
Lord Lyon (1863–1887) was a British Thoroughbred racehorse that won the 1866 Epsom Derby, 2,000 Guineas Stakes and the St. Leger Stakes, becoming the third winner of the English Triple Crown. Lord Lyon raced until he was four-years old and was retired to stud in 1868. He is considered to be a marginally successful sire with his most notable progeny being the colt Minting and the filly Placida. He was euthanized in April 1887 after several years of failing health.
Usage examples of "lord lyon".
And he was quite prepared to have me sent away to be Changed if I didn't please Lord Lyon last night.
If I were to receive a proposal of marriage tomorrow from the Lord Lyon King-of-Arms I would decline it.