Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
सूतकांते नामकर्म विधेयं तत्कुलोचितम् ।नामपूर्वं प्रशस्तं स्यान्मंगलैः सुसमीक्षितैः ॥ ३२७ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 327.
When the impurity ends, do the naming rite in the way the family follows. A name with a lucky start is praised. Choose it after checking the lucky signs well.
Simple meaning: Name the child when the impurity ends, in the way the family follows.
देशकालोपघाताद्यैः कालातिक्रमणं यदा ।
If the time is missed, do the rite when Venus and Jupiter are visible and the Sun moves north.
चरस्थिरमृदुक्षिप्रनक्षत्रे शुभवासरे ।
Choose a moving, fixed, soft or quick star on a good weekday, when the child and father have Moon and star strength.
शुभलग्ने शुभांशे च निधने शुद्धिसंयुते ।
For boys the 6th or 8th month, for girls the 5th, with a good rising sign and a clean 8th house.