Heike Kamerlingh Onnes
…Bijleveld, with whom he had one child, named Albert. His brother, Menso Kamerlingh Onnes (1860–1925), was a painter and the father of another painter, Harm Kamerlingh Onnes. Their sister, Jenny, married Floris Verster (1861–1927), also a painter. Some of the instruments Kamerlingh Onnes devised for his experiments can be…