Namology is the science of naming children using Astrology and  Numerology. The names are suggested by Astrology   and checked for Numerological  Compatibility.

What is needed is the date, time and place  of birth of the child.

In Astrology, there are many methods for naming. One is to name the child after the most powerful planet or the functional benefic in the chart. The  other is to name the child after the Bhagyadhipa or the Lord of Fortune.

In the Vedic system, various deities have been assigned to the   Seven   Revolving Heavens, according to the Vedantic classification of the triune attributes of Nature - Satwa, Rajas and Thamas ( corresponding to the Id, Ego & Superego of Freud ).

eastrovedica.com/html/namology.htm

Sun  Lord Siva
Moon  Durga
Mars  Lord Muruga  
Mercury  Incarnation of Vishnu  
Jupiter  Lord Vishnu
Venus  Divine Mother  
Saturn  Lord Ayyappa  

In the Christian System, Jesus will be Jupiter and Mother Mary or Mary Magdalene Venus, the Sacred Feminine.

Well in vedic astrology, usually ppl tell what alphabets the name should start with, & that always helps a lot.