Two years ago Trevor F. Smith wrote about the pronunciation of “Vannevar Bush”:

Bush showed his own “spark of belligerency.” He was quick to take exception to things. Even his own first name, with its Dutch pronunciation (Vuh-NEE-ver), irritated him. “The strange name” was “a nuisance,” always requiring an explanation or a quick lesson in pronunciation. Bush wished his father had named him John, after the first name of his friend, and his sisters indeed called him John at times.

The Vannevar Bush Wikipedia entry confirms that His name was pronounced Van-NEE-var. as in “receiver”.