The new pontiff's maternal grandparents lived in New Orleans and in the 1900 census were described as Black. https://www.nola.com/news/first-american-pope-roots-new-orleans/article_3c7bfdf1-8f69-452e-af01-90aa012366df.html
Pope Leo XIV has roots in New Orleans' 7th Ward. See his family lineage and history.
In prior interviews, Pope Leo XIV said he was open to a vocation to the priesthood because neighborhood priests were always in and out of his childhood, as his mother often fed them. "Now we know why her cooking was so good— both her mother and father were from New Orleans."