Trolleite and Troilite are both rare minerals with very similar names. The former is a blue phosphate mineral named after Hans Gabriel Trolle-Wachtmesiter (1782-1871), a Swedish politician and chemist. The latter is a brassy sulfate mineral most often found on meteorites that was named after Domenico Troili (1722-1792), an Italian Jesuit Abbot.
Trolleite was first collected in 1868 from the Västanå iron mine in Sweden. It was sent to Christian Wilhelm Blomstrand (1826-1897), a Swedish mineralogist and chemist, and one of the early developers of the periodic table. His research focused on characterizing and analyzing minerals, particularly those that are rare or of unknown composition. When Blomstrand concluded that it was a new mineral, he named it in honor of Hans Gabriel Trolle-Wachtmesiter, a fellow chemist and retired politician.
The Swedish noblemen had been the Chancellor of Justice from 1809-1817. While he retired, he devoted himself to scientific pursuits. In his youth he had been interest in zoology, but during his time as Chancellor of Justice he had developed a keen interest in chemistry. By 1821, he had been elected to the Swedish Academy of Sciences, the scientific body that is responsible for selecting the Noble Prize in Physics. Trolle-Wachtmesiter maintained his membership for the next fifty years and had the title of excellence. He frequently corresponded with fellow chemists and other scientists. In 1861, Blomstrand joined the Academy of Sciences and most likely the two of the connected either at that time or perhaps after Blomstrand named the rare blue mineral.