Eva P.McGill;69;of Henry St.;Belle Vernon;died Wednesday;Dec.30;1998;at 6 a.m.in Mon Valley Hospital;Carroll Township. Born Jan.9;1929;in Belle Vernon;she was a daughter of the late Carlos and Assunta Mazzei Pesi.  She was a member of St.Sebastian Roman Catholic Church and the church choir.  Mrs.McGill was a former member of the Mon Valley Chapter of Sweet Adelines.  A lifelong resident of Belle Vernon;she was formerly employed by Valdiserri’s Bakery in Belle Vernon and was also a former operator for Bell Telephone.  In addition to her parents;she was preceded in death by her husband;William F.McGill;who died Nov.14;1994;a brother;Ector Pesi;and a sister;Rosita Fantini.  Survivors include a daughter and son-in-law;Cheryl and Richard Boyles of Belle Vernon;two sons and daughters-in-law;Kevin and LuAnn McGill of Forward Township and Robert and Diana McGill of Altus;Okla.;two brothers;Carl Pesi of Fairhope and Mario Pesi of Lynnwood;one sister;Yolanda Neil of Belle Vernon;and six grandchildren.    Friends will be received Thursday from 7 to 9 p.m.and Friday from 2 to 4 and 7 to 9 p.m.in the Ferguson Funeral Home Inc.;700 Broad Ave.;Belle Vernon;where a Prayer service will be held Saturday at 9:30 a.m.;followed by Funeral Mass at 10 a.m.in St.Sebastian Roman Catholic Church;Belle Vernon;with the Rev.Donald Trexler;parochial vicar;officiating.  Interment will follow in Belle Vernon Cemetery.  Ferguson Funeral Home Inc.is in charge of arrangements.