Ponderosa lemon
The ponderosa lemon originated in roughly 1887, and is believed to come from a chance seedling grown in Hagerstown, Maryland. It was later named and introduced to the nursery trade in 1900. Though often referred to as a cross between the lemon and citron, a recent genomic analysis showed it to solely contain pomelo ("Citrus maxima") and citron ("Citrus medica") DNA, perhaps being an F2 hybrid. Thus they cannot derive from true lemons, which have a mandarin orange component.
Absolut Citron
Absolut Citron is one of the major core flavors of Absolut Vodka. The name means "lemon" in Swedish, and it is made from citrus fruits. It is crafted from Swedish winter wheat and water comes from deep well in Åhus. Absolut Citron was launched in 1988.
The drink is best suited for cocktail cosmopolitans and among many other drinks.