There are two narrators in My Antonia.
Willa Sandmeyer's birth name is Willa Joan Sandmeyer.
Willa Cather's birth name is Cather, Willa Sibert.
Willa Holland's birth name is Willa Joanna Chance Holland.
Willa Jean is a girl's name.
Willa Ward's birth name is Willarene Ward.
The Camel's name is Samuel in Willa's Wild Life.
Willa Ford's birth name is Amanda Lee Williford.
The name 'Willa' is still used today with the same spelling. The noun 'Willa' is also a brand of skin care products.
There is no word "willa" in Spanish or English. If it is a proper noun, it need not be translated.
Willa Cather
Mary Streep's birth name is Mary Willa Wilkinson.
Tiger Darrow's birth name is Jacqueline Willa Darrow.