The Gill - Kornrums of San Antonio, TX

I am seeking familiy names ROARK, from Illinois to Texas;also KORNRUMPF (later KORNRUM), arrived approx 1856 in Galveston or Port Lavaca, Texas, from Goettingen,Germany; they settled in San Antonio, Del Rio and Bracketville. wilhelm Kornrum first appeared in 1870 Census. Also am searching the GILL family, who came to Texas from Arkansas or Tennessee, approximately 1845, settled in south Texas.
Any information would be appreciated; I am willing to share any information I have.