Harald Fryklöf Leonard was a Swedish organist, music teacher and composer.
Fryklöf studied counterpoint and composition at the Royal Swedish Academy of Music in Stockholm. When Philip Scharwenka lived in Berlin in 1905, he took lessons of instrumentation. From 1904 to 1910 he was a piano student of Richard Andersson. In 1908 he was organist at the Storkyrkan and at the same time teacher at the Conservatory of Stockholm.
As a composer Fryklöf emerged especially with songs and piano works, besides he composed, among other several motets, sacred choral songs a cappella and other church music and a violin sonata, which is considered one of his best works. In 1916 he published a textbook of harmony. Fryköf died in 1919 at the age of thirty-six years of the Spanish flu.