Information of Edward Wayne Lucas in Indiana

Hi. I'm looking for information on my great-grandfather, Edward Wayne Lucas. He died in 2001 in Indianapolis, and was married to a woman named Helen (not sure of her maiden name). His children were Pete, Darlene, Debi, Helen, Jim, Jan, and Judy. The two main pieces of information I'm looking for are his wife's maiden name and his parents' names. The best information I have comes from his and his daughter's obituaries, which is all I can seem to find.