H7 was the royal cypher of the Norwegian head of state, King Haakon VII, who reigned from 1905 to 1957. When Germany invaded Norway in 1940 as a part of World War II, the royal family fled the country and Haakon VII later spearheaded the Norwegian resistance in-exile in the United Kingdom.
H7 also refers to Influenza A virus subtype H7 (disambiguation), all virus containing the H7 type agglutinin