The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
Nisan
first monththat is, April.
Tobiah
Two Tobiahs are distinguished by many:
(1) "Tobiah the servant, the Ammonite," (Neh 2:10); (Neh 2:19); Heh 4:3,7 6:1,12,14.
(2) A Jew, unable to prove his genealogy. But the reference to the latter (Neh 7:62) indicates that he was already dead. But one Tobiah, and he the Ammonite, is active in this book.
laughed
The obstacle of ridicule.