Question: Who is the oldest player to have appeared in a world cup match?
Disambiguated questions and answers: question: Who is the oldest player to have appeared in a men's world cup match?
Who is the oldest player to have appeared in a men's world cup final match?
Who is the oldest player to have appeared in a men's world cup qualifying match?
Who is the oldest player to have had a debut appeareance in a men's  world cup qualifying match?
Who is the oldest player to have appeared in a women's world cup match?
Who is the oldest player to have appeared in a women's world cup final match?
Who is the oldest player to have had a debut appeareance in a women's  world cup qualifying match?
answer: Essam El-Hadary
Dino Zoff
MacDonald Taylor Sr.
Essam El-Hadary
Miraildes Maciel Mota
Formiga
Christie Rampone
Margarete Maria Pioresan
Meg
Natural Questions answer: Essam El - Hadary (from the Wikipedia article "List of FIFA World Cup records")