Baron Blood is the name of several fictional characters that appear in comic books published by Marvel Comics.

The original version first appears in Invaders #7 (July 1976) and was created by Roy Thomas and Frank Robbins.

The second character first appears in Doctor Strange, Sorcerer Supreme vol. 3, #10 (Dec. 1989) and was created by Roy Thomas and Jackson Guice.

The final version first appears in human guise in Captain America #253 (Jan. 1981), and was created by Roger Stern and John Byrne.

John Falsworth first appears in the title Invaders as an English aristocrat. Although posing as the son of the first John Falsworth, it is revealed in flashback that the character is in fact the original, made possible due to the fact that he is now an ageless vampire.^{[volume & issue needed]} When the family fortune is left to older brother James, John Falsworth leaves England to pursue an interest - vampire lore. Falsworth travels to Transylvania and encounters the original vampire Dracula, who, after overpowering Falsworth, drains his blood and turns him into one of the undead. Dracula then commands Falsworth to return to England and cause havoc in revenge for the deeds of former opponent Jonathan Harker. Adopting the alias of Baron Blood, the character allies with Germany during World War I and without either party realizing the identity of the other, battles his own brother, who is now the English hero Union Jack. Blood is wounded by Jack with a silver dagger, and flees to recover.^{[volume & issue needed]}

Jens Otto Harry Jespersen or Otto Jespersen (Danish pronunciation: [ʌto ˈjɛsbɐsn̩]; 16 July 1860 – 30 April 1943) was a Danish linguist who specialized in the grammar of the English language.

Otto Jespersen was born in Randers in Jutland. He was inspired by the work of Danish linguist Rasmus Rask as a boy, and with the help of Rask's grammars taught himself some Icelandic, Italian, and Spanish. He entered the University of Copenhagen in 1877 when he was 17, initially studying law but not forgetting his language studies. In 1881 he shifted his focus completely to languages, and in 1887 earned his master's degree in French, with English and Latin as his secondary languages. He supported himself during his studies through part-time work as a schoolteacher and as a shorthand reporter in the Danish parliament. In 1887-1888, he traveled to England, Germany and France, meeting linguists like Henry Sweet and Paul Passy and attending lectures at institutions like Oxford University. Following the advice of his mentor Vilhelm Thomsen, he returned to Copenhagen in August 1888 and began work on his doctoral dissertation on the English case system. He successfully defended his dissertation in 1891.