Lucien Sophie Albert Marie von Römer (23 August 1873 – 23 December 1965) was a Dutch physician, botanist and writer. He often wrote about homosexuality, and argued that it was an innate characteristic. He practiced medicine in the Dutch East Indies (later Indonesia) in his later life. His views parallel those of psychiatrist Sigmund Freud on this topic.
Gerard Hengeveld (December 7, 1910, in Kampen – October 28, 2001, in Bergen, North Holland) was a Dutch classical pianist, music composer and educationalist. He is especially known for his compositions of study material for piano. Other compositions include two piano concertos, a violin sonata, and a sonata for cello. Hengeveld was an able interpreter and performer of the music of Bach for piano and harpsichord. He gave regular concerts in the Concertgebouw in Amsterdam. Some of his concerts were captured on record. Hengeveld was a professor at the Royal Conservatory of The Hague. Amongst his students was Dutch pianist and musicologist Frans Bouwman.Hengeveld died in 2001 at the age of 90, in Bergen. His closest living relative is Nicholas Hengeveld of Allentown, Pennsylvania.