Anybody still searching on the Anitfa 3 arrows symbolism, I found this old paining of Prince Henry standing on a shield with what appears to be 3 arrows circa 1610 by Painter Robert Peake the Elder,
I don't know what it means, but found it interesting the prince was stepping on the shield as if to destroy whoever the shield belonged to. This might give some clue as to who the Astor's ancestry was.
https://g1b2i3.wordpress.com/2011/08/07/robert-peake-the-elder-c-1551โ1619-pictor-englez/