For baptism, sponsors are typically called “Godparents.”
For infant baptism, one sponsor is required and two are acceptable. If one has two sponsors, one must be male and the other female.
For adult baptism (through RCIA) and for both teen confirmation and adult confirmation (through RCIA or not), one typically has one sponsor, though two are acceptable.

Sponsor Requirements:

• The sponsors must be asked to be a sponsor by the person receiving the sacrament,
  or by the parent(s) or guardian(s) of the person receiving the sacrament (if the person receiving the sacrament is below the age of seven). 
• Be at least 16 years of age.
• Have received baptism, confirmation, and Eucharist in the Catholic Church.
• Be either unmarried, or in a marriage that was witnessed or blessed in the Catholic Church.
• Attend Mass and receive the Sacraments of Eucharist and Penance regularly.
• Intend to attend the Mass at which the person you are sponsoring is to receive their sacrament(s).
• Not be a parent of the person receiving the sacrament.

Duties of Sponsors for Teens/Adults:

• Pay special attention to the candidate during his/her time of sacramental preparation
• Assist where needed in his/her effort to live a Christian life that reflects the spirit and teaching of the Catholic Church
• Provide a good Christian example
  Pray for the candidate
• Share and discuss what living a Catholic life means to the two of you
  provide emotional support