Probably a modern coined form built from Don- and a feminine ending.
Donitra is probably a modern coined form built from Don- and a feminine ending. That sort of construction is characteristic of contemporary English-language naming, where a traditional prefix can be paired with a fresh suffix to produce something that sounds personal and distinct.
Donitra therefore feels partly familiar and partly newly assembled. Its sound is smooth, feminine, and a little formal, with the Don- opening giving it a sense of strength or respect. The ending helps it move beyond simple nickname territory and into a more complete given-name shape.
Names like Donitra often succeed because they feel intentional: not random, but crafted. That sense of deliberate style gives the name presence, even without a long recorded history behind it.