Lydia probably died of natural causes as there is no mention of her being a martyr. Her feast day is on August 3 but that is not necessarily the day she died. We do not know hte date of her death.
Lydia Litvyak died on August 1, 1943 at the age of 21.
Lydia Koidula died on August 11, 1886 at the age of 42.
Saint Lawrence of Rome died on the 10th of August.
Saint Aidan of Lindesfarne died August 31, 651, at Bamburg, England, of natural causes.
Lydia Veicht died in 2007.
Lydia Wahlström died in 1954.
Lydia Lipkowska died in 1958.
Lydia Boucher died in 1971.
Lydia Davydova died in 2011.
Lydia Sigourney died in 1865.
Lydia Pinkham died in 1883.
Lydia Mei died in 1965.