Deceased Classmate: 1966 Margareta Lykins Rosnow
Date Of Birth: September -13-1948
Date Deceased: 1/14/1998
Age at Death: 49
Cause of Death: 
Classmate City: Jackson
Classmate State: WI
Classmate Country: USA
Was a Veteran: No 
Survived By:

Husband Neal, had two children, a son Ryan and a daughter Sarah (we believe that's her name)

Margretta L. Lykins - June, 1966.

Margretta died, 1/4/1998 ~  http://www.ancientfaces.com/person/margretta-l-rosenow/54843089

Also -- https://www.myheritage.com/research/collection-10002/us-social-security-death-index-ssdi?itemId=51576221-&action=showRecord

I also found this obituary for her mother.  Here is just the beginning of it:  

Hanie "Margret" Lykins

Lykins, Hanie "Margret" (Née Stegall ) Called Home to the Lord, Tuesday, March 11, 2014, at the age of 88. Preceded in death by daughter Margretta Rosenow.
- See more at: http://www.legacy.com/obituaries/jsonline/obituary.aspx?pid=170244375#sthash.kOLDLfz0.dpuf

I couldn't find Margretta's obituary because it was before 2001.  The Milwaukee Journal Sentinel only goes back to January, 2001.  (The "I" is Linda Durrenberg '69, alumni foundation historian)