Oort is a Dutch toponymic surname[1] most commonly referring to the astronomer Jan Oort.
Oort was one spelling of a Middle Dutch word for 'edge' or 'end', as in "the edge of town".
[2] Variant forms are Oord, Oordt and Ort, as well as Van Oort, Van den Oord etc.
('from the edge [of town]').