Dutch member of a noted family, an Orientalist.
He was the sixth of the seven children of Johannes van Vloten (18 January 1818 – 21 September 1883) and Elisabeth van Gennep (7 April 1824 – 17 March 1906). He was raised in the Liberal and culturally very active house of his parents in Deventer, Bloemendaal and Haarlem.
He followed the Gymnasium of Haarlem from 1878 to 1884. He was interested in Botany and enjoyed th long strolls through the North Sea dunes with the father of his brother-in-law Frederik van Eeden, the botanist and conversationalist Frederik Willem van Eeden. As a student, he became a member of the “Nederlandsche Botanische Vereeniging, Leyden”. But like his father, he his great love was for Letters and history. His father proposed him to study Sanskrit. But in 1884 he studied Semitic languages under Michael Jan de Goeje at the University of Leiden. He dissertated 20 September 1890 cum laude with “De opkomst der Abbasiden in Chorasan”. That year he became a teacher in Hebrew at the Gymnasium of Leiden.
Via De Goeie, he was asked to reconstruct the work of al-Balkh?, a 10th-century Persian encyclopedist and the author of the early encyclopedia “Maf?t?? al-?ul?m” (Key to the Sciences) in the Arabic language. He contributed to the “Tables alphabétiques du Kitab al- Aghani” of prof. Guidi in Rome and wrote in German and French oriental magazines.
Like his father, he was not a strict philologist, but was more interested in cultural history and the mindsets of different times and cultures: “Hem trok in de Arabische letterkunde bovenal aan wat deze ons leert omtrent het maatschappelijk en intellectueel leven der Oosterlingen, hun voelen en denken, hunne zeden en gewoonten, hunne vooroordeelen en bijgeloovigheden”.
In 1897 he travelled to study texts of al-Djâhiz via Constantinople to Damascus. In Constantinople, where he stayed some months visiting libraries, he witnessed the precursors of the Armenian Genocide of 1915. Armenian’s were humiliated and together with the Young Turks killed and thrown in the Bosporus. He tried to observe the Oriental world with beggars, fatalism, poverty from a distance, but it must have been quite a culture-shock for a sensitive person that had been raised in a privileged environment. He wrote about it later in “Oostersche schetsen en vertalingen” (1900). In Damascus he became ill and had to go back. Back in Holland, his previous health never returned and periods of enthusiastic, hard work were followed by depression, wrote Prof. De Goeie. De Goeie characterised Gerlof Van Vloten as essentially a very timid and sensitive person, with a childlike simplicity and goodness, but one who was also ashamed of it, so that he could overcompensate for it by exaggeration and even lumpiness.
Like his father, Gerlof spoke many modern and old languages. He published in Latin, Arabic, German, French and Dutch. According to Jeroen Brouwers (De Laatste Deur), he felt that he was in the shadow of his brother-in-law. He shot himself with a pistol in his beloved dunes of Noordwijk aan Zee on 20 March 1903.
He never married and left no children.

Link to Dutch Wikipedia