Testator / Testatrix - You.

Executors - The people who carries out your Will (can not be a beneficiary or witness).

Beneficiaries - Your loved ones that you want to pass your legacy to (can not be an executor or witness).

Witnesses - The people that sign your Will during the Final consultation (can not be executors or beneficiaries).

Codicil - Changes to the Will within a separate document.