Brant Name Meanings
In the "New Dictionary of American Family Names" by Elsdon C. Smith, published by Harper & Row, Copyright 1956, 1973, on page 56, the name is defined:
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Brandt, Brant (Ger., Eng.) Dweller on a farm cleared by burning; dweller near the Brant (steep), a river in Lincolnshire.
Steep is defined as steep slope or incline.