1) Dutch surname 2) Impact crater on Mercury 3) Occupational surname 
Kuiper or Kuyper is a Dutch surname. Notable people with the name include: ...[crater on Mercury] Kuiper is a moderate-size crater with a central peak cluster located at 11 S, 31.5 W on Mercury. It is 60 km in diameter and was named after Gerard Kuiper. Kuiper crater has the highest recorded albedo of any region on the planet`s surface, suggesting that it is one of the youngest craters. Kuiper overlies the northern r...[lunar crater] To the east-southeast of Kuiper crater is the crash landing site of the Ranger 7 probe, the first American spacecraft to photograph the Moon. Gerard Kuiper was the Project Scientist for the Ranger program, and this feature was named for him after he died in 1973. ...
Gerard Peter Kuiper (1905-1973) American astronomer born in The Netherlands. Studied the origin of the solar system, and planetary atmospheres.
1905–73, U.S. astronomer, born in the Netherlands.