Misc: What are the hole punchings on a postage stamp called?

Questions

Name of a sub division of a county once under Danish influence, especially in Yorkshire?

From where did the first banana come?

Which golf commentator won the Whyte and Mackay PGA championships in 1957,1962 & 1965?

Who is the heroine of Shakespeares As you like it?

Which jazz clarinetist recorded Mozarts Clarinet concerto with the Boston Symphony Orchestra?