Whose grandfather rode the winner of the Grand National horse race the year that the "Titanic" sank?

Ernest Piggott (1878–1967) was a leading British jump racing jockey, whose family has become one of the leading dynasties in British horseracing. He was three times Champion Jockey and three times Grand National winner. His son, (Ernest) Keith Piggott (1904–1993), was also a leading jump jockey and National-winning trainer, while his grandson was the 11-times British flat racing Champion Jockey, Lester Piggott.

His first Grand National victory came in 1912 on 4/1 joint favourite, Jerry M, trained by Robert Gore and owned by Sir Charles Assheton-Smith. Although this trainer-owner pair won the following year's National with Covertcoat, Piggott was not on board, and it wasn't until 1918, when the Grand National was held at Gatwick (as Aintree had been commandeered by the War Office) that Piggott got a follow-up success with Poethlyn. The same horse gave him his third and final National victory back at Aintree in 1919 when it went off 11/4 favourite, the shortest priced winner in the history of the race.

RMS "Titanic" was a British ocean liner that sank on 15 April 1912 as a result of striking an iceberg on her maiden voyage from Southampton, England, to New York City, United States. Of the estimated 2,224 passengers and crew aboard, approximately 1,500 died (figures vary), making the incident one of the deadliest peacetime sinkings of a single ship.