Baum

[bawm, bahm for 1; boum for 2] /bɔm, bɑm for 1; baʊm for 2/
noun
1.
L(yman) Frank
[lahy-muh n] /ˈlaɪ mən/ (Show IPA),
1856–1919, U.S. journalist, playwright, and author of children's books.
2.
Vicki, 1888–1960, U.S. novelist, born in Austria.
British Dictionary definitions for Baum

Baum

/bɔːm; bɑːm/
noun
1.
L(yman) Frank 1856–1919, US novelist, author of The Wonderful Wizard of Oz (1900) and its sequels