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Yes, two witnesses are required, and both can be male or female, or one of each. Also, you can have more than two witnesses if that is your wish.
You need two witnesses to sign the marriage license.
Two Witnesses.
To be convicted of treason, prosecutors need at least two eye witnesses. With out any witnesses, a person can not be convicted of treason.
The 2 key witnesses were Rab, and Cilla.