Cases of HSP may occur anytime throughout the year, but some studies have found that fewer cases occur during the summer months. The disease is named after Eduard Heinrich Henoch (1820--1910), a German pediatrician (nephew of Moritz Heinrich Romberg) and his teacher Johann Lukas Sch*nlein (1793--1864), who described it in the 1860s.
Eduard Heinrich Henoch
Moritz Heinrich Romberg