The name Niven is a boy's name of Scottish origin meaning "little saint". Niven and is often added to lists like Scottish Baby Names and discussed in our forums with posts like "Harry Potter House Sorting Name Game".
From the experts:
Excellent candidate for use as an undiscovered surname name. Niven is the Anglicized spelling of the Irish name Naomhan, a diminutive of the word naomh which means saint. This handsome but unusual name was given to only six boys in the US last year. Your parents may be familiar with actor David Niven.