Entering a spiritual path is a rebirth. We are born to a new life, a new experience, a new understanding of what defines us.  It is a tradition in many spiritual paths to receive a new name. Siri Singh Sahib Yogi Bhajan gave spiritual names based on numerology (your date of birth).

One of the greatest benefits of using a spiritual name is the effect that occurs physically, when you (or others) speak it. The words are comprised of mantric sounds ( Naad ) that stimulate the energy
meridians of the body when pronounced. This actually changes and upgrades brain activity. The effect of the Naad is subtle and also very powerful. Another benefit is the meaning of the name.

The meaning gives a concept and a vision of your spiritual identity.
Receiving a spiritual name is a gateway for you to inherit your most elevated destiny. Taking and using a name is a guide toward a deeper awareness of who you are.

Meditate on your spiritual name. Go deeply into its sound and meaning.
Receive it as a gift from the Divine.

You can request a Spiritual Name, as was instructed by the Siri Singh Sahib, from the trained staff at the Spiritual Names Office:

https://www.spiritual-names.org/request-spiritual-name

An example of a Spiritual Name Destiny Card: