Dr. and Mrs. James Llinas of Williamsville celebrated their 50th wedding anniversary with a renewal of marriage vows officiated by the Rev. Michael Tunney in their home, followed by a dinner reception for family and friends in the Roycroft Inn, East Aurora. Dr. Llinas and Sarah Sanchez were married Oct. 14, 1961, in Christ the King Catholic Church, Springfield Gardens, Queens. He is research professor emeritus at the center for multisource information fusion and semiretired engineering professor at the University at Buffalo; she is a retired treasurer for Power Funding Group, Amherst. The couple has three children and six grandchildren.