कौशिक गृह्यसूत्रम् (अथर्ववेद शौनक शाखा - संक्षिप्त टीका एवं पं. उदयनारायण सिंह हिन्दी अनुवाद)

, an anunasika or a svara mark can be placed over a letter.
Whatever the reason, the glyph is clearly a candrabindu (ँ).
Wait, is it on 'व'? Yes, "वँ".
Wait, could it be "थ्याँवद्योर्जं"? The candrabindu's crescent is centered right above the 'व'.
So: "थ्यावँद्योर्जं" or "थ्यावद्योर्जं"?
Wait, let's look at whether it's 'व' or 'वँ':
Writing "थ्यावँद्योर्जं" perfectly captures what is printed!

Wait, let's re-verify line 17:
"इमं समिन्धिषीमह्याययुष्मन्तः सुवर्चसः ॥ त्वमग्न ईडित"
Yes, "समिन्धिषीमह्याययुष्मन्तः".

Let's re-verify line 1:
"प्राग्रतमं श्रोत्रियाय ॥८॥ अथ यस्य भार्या दासी वा"
Wait, "प्राग्रतमं" - look at the first word:
'प' with 'र' = प्र, with 'ा' = प्रा.
Then 'ग' with 'र' = ग्र.
Then 'त' = त.
Then 'मं' = मं.
"प्राग्रतमं".
Wait, in line 21 Hindi: "और जो यज्ञिया दूसरी होती