What are the connotations of "Vayikov"?
Rashi: It means that he specified the Name of Hashem 1 before blaspheming it.
Moshav Zekenim, citing R. Eliezer of Garmaiza: He literally [wrote Hashem's name] and pierced it. He also blasphemed verbally.
Rashi: The precise Name of Havayah that he heard at Har Sinai.
Why does the Torah see fit to specify the name the blasphemer's mother?
Rashi: It is in praise of Yisrael, since she was the only woman who had illicit relations.
What is the significance of her name?
Rashi: "Shelomis" - she would twitter 'Shalom to you! Shalom to you', enquiring after the wellbeing of all and sundry. "Bas Divri"- she was talkative, and tended to speak to anybody she met (including men) - and that is what caused her ruin.
Why does the Torah find it necessary to specify the name of her tribe?
Rashi: It teaches us that a Rasha shames himself, his father and his tribe. 1
Bechor Shor, Chizkuni, Da'as Zekenim: This caused the quarrel. People of Dan crave judgment (Pesachim 4a). 2
Rashi: By the same token, the Torah writes in Shemos 35:34 "Ohali'av ben Achisamach l'Mateh Dan" to teach us that a Tzadik brings praise upon himself, upon his father and upon his tribe.
They imply that the blasphemer received this trait from his mother's tribe. Even though normally it depends only on the father, perhaps this is only when the father is a Yisrael. Or, perhaps the reason why others protested and brought him to Moshe was because he wanted to camp among them, and they were from Dan! (PF)