Baby Names Beginning With "A": Meaning: April?

Questions

Which jazz pianist composed the jungle music "Black and Tan Fantasy" with Bubber Miley, and recorded it with his band in 1927?

What did Brahms compose for the University of Breslau after they gave him an honorary PhD?

Who formulated the laws which first explained the movements of the planets properly?

What does the sign BYO, seen outside some Australian eating places, mean?

Which fungal plant disease particularly affects brassicas?