1)
What is the meaning of "me'Im Ish"?
1.
Rashi citing Targum Yonasan: From her husband.
2)
Why is he called Palti'el? Above (1:25:44), he is called Palti!
1.
Radak citing Sanhedrin 19b: His name here hints to Palto Kel, for Hashem saved him from the Aveirah of having Bi'ah with Michal.
3)
According to the opinion that Palti's Kidushin was b'Aveirah, how could David remarry her later? He did not remarry her b'Isur - he sinned "Rak bi'Dvar Uriyah" (Melachim I, 15:5)!
1.
Refer to Shmuel I, 25:44:2:1-5.