Talk:fecundan

I'm wondering if anyone can help me here...An elderly man asked if I knew what the meaning of Fecudan DHU mean..He read it once in a book ..and in the book it was on a plane with a circle and in the circle was a yellow circle and inside that was a bat..He was wondering if it meant something bat.. if it was something to do with fequences in the war ..please let me know ..he's 91 and is puzzled ..all it tells me is it is a Spanish word ..thanks so much ..philomena Brown