There are several parties involved in a Last Will and each person plays a different role.
The Testator (male) or Testatrix (female) is the Last Will's creator. It is their assets that will be distributed when they pass away.
The Executor is the person (or persons) the Testator designates to execute the instructions contained in their Last Will. Your Executor may be a beneficiary listed in your Will. You can also designate an Alternate Executor in case your primary Executor is unable to administer your Last Will.
A Beneficiary is someone who will receive some or all of your estate upon your death. You may name multiple beneficiaries and divide your estate between them as you choose.
A Guardian is one or more persons you want to care for your minor children after you are gone.
A Pet Caretaker is the person you designate to care for your pet(s) after you pass away.
When choosing your Executor, Guardian, or Pet Caretaker, take care to select someone who is trustworthy and can handle the responsibilities of their appointed role. You should discuss your wishes with them and ensure they are willing to accept the role before writing them into your Last Will.
A Witness is someone who validates the completed draft of your final Will. This is achieved by having them observe you when you sign your Will, and then having them sign your Will as well. In Ireland, you must have two Witnesses sign your Last Will and Testament.