The Reds are aware they may lose Mohamed Salah this summer, as he has not yet signed a new contract.
If he does leave, his countryman Marmoush may be a direct replacement for the attacker.
German media reports, Eintracht have told Liverpool they will only sell for a fee of around £50m.
Cairo-born Marmoush, who is 25, has scored nine goals and managed four assists so far this season.
His agent Michael Reschke started recently: “We have good plans for Marmoush.
“Marmoush has been delivering outstanding performances recently and a bright future awaits him.
“He currently has a global market, so we don’t rule out receiving offers from all over the world.
“Marmoush is greatly loved within Eintracht Frankfurt, so offers are not only expected from within Germany but from all over Europe.
“This isn’t a strange matter, and we should all expect it because his performance, level, and name have become like gold currency and the energy he possesses on the pitch promotes him.
“He has a completely distinctive style, his eyes are sharp, and I cannot compare him to anyone else. He is a wonderful and special player.”