Last address probably on her death certificate? However, it isn't currently online. Your granny predeceased both of her brothers. I would purse Joe E. Morgenroth's (13 Nov 1936 - 7 Feb 2009) son, Jeffrey Edwin (born 5 Mar 1962). Lots of public address records viewable on ancestry.com. Your granny's other brother, Wallace, appears to have relocated to Lake Charles, LA. Although I didn't find a death record, researching him can be challenging.