Erdin Shaqiri admits his brother had offers to leave Anfield in January, and those clubs could re-ignite their interest.
The Swiss international has made only one Premier League appearance in 2020.
"I think there will be many offers for Xherdan in the summer," Erdin Shaqiri said to Kosovar TV station KTV.
"Already in January there was concrete interest from two or three clubs. These - their names have already been taken up in various media - will knock again.
"Xherdan's situation in Liverpool is not easy because of several minor injuries that lasted longer than we thought.
"Jurgen Klopp is in talks with him about more game practice - we have to wait and see.
"I think Xherdan deserves a lot more. He was unlucky with his injuries, but every time he could play again, he did his job and changed the game."