Continued fromSiehe auch: Manches Lied und Menuett enstand nur
Richard listed several examples with the plural in that thread. Here are several with the singular:
From the first growth of the tree, many a limb and branch has decayed and dropped off (Darwin)
And o'er them many a sliding star, / and many a merry wind was borne (Tennyson)
Many a wide waste and tangled wilderness / has lured his fearless steps (Shelley)
Many a clergyman, many an author, many a lawyer and statesman has found (Seward)
But many a soldier and sailor was ready to say (Time Magazine)
Two years ago many a preacher and layman was pleased when (Time Magazine)
This is obviously not something that will often come up. I personally am ready to say that anyone tempted to use such a construction in the modern day should probably just rephrase in the plural: Many ____s and ____s ...
But it could still be interesting to get comments from other English speakers, and particularly, any more authoritative opinions, for example, from a grammar reference book.