Whose name is this? - Page 38

Shri Krishna, younger brother of Balaram

Correct!

103. Whose name was Pāṇḍupūrvaja?

Correct! Pāṇḍu's elder brother is Pāṇḍupūrvaja.

The name could also be interpreted as the one whose elder brother is Pāṇḍu.

104. Whose name was Keśavapūrvaja?

Balaram, referred as Keshava's elder brother.

Correct!

105. Whose name was Śalāgraja?

Bhurishrava, Son of King Somada. He fought against Pandavas. On the 14th day of the war, when Arjun was on his way to kill Jaydrath, he cut the left arm of Bhurishrava to save Satyaki. 

Bhurishrava had a younger brother called Shala, hence named Shalagraja. 

Correct!

However, Bhūriśravas's father is usually called Somadatta, and since Bhūriśravas uses his left hand at Droṇaparvan 118.17 as he enters prāya, clearly it was his right arm that Arjuna cut off.

106. Whose name was Gadapūrvaja?

I think it's Shti Krishna, Gada is his younger brother.

Correct!

107. Who was called Sauti?

Ugrashrava, also knows as Lomaharshana. Because he was son of a Suta.