Have information on Irgang's dating back to 1640 in Wiesenthal Germany. My grandmother was Dora Reibert Radke (b12/11/1889)-daughter of Barbara Elizabeth Irgang Reibert (b 3/2/1864) - daughter of Tobias Irrgang(b9/13/1831) and Katherine Margaretha Schuck (b11/29/1831) (other children of Tobias and Katherine were Frederick, August Wilhelm, Valentine, Katherine Margaretha and Andreas (Adam) all born in 1850's and 1860's- Tobias was son of Kasper Adam Irrgang (b 11/20/1810). I will stop there - respond to posting if need further information.