Welk Research Seeking Long Lost Cousins

This is my Grandmother's line...Father William Frederic Welk, son of Henry and Louisa from Germany. William was born in Iowa in 1848 and moved with his family sometime before he married, to Ashland, Ohio.
His wife was Mary Elizabeth Kreisher, daughter of Charles Kreisher from Germany. Would like to find living relatives from this side of the family. Grandmother's sisters: Rena married Will Richards, Carrie married James Corlett,and there were three boys: Isaac, Charles, and
Jesse.