Since overthrowing Morsi in July, the army-installed government has arrested thousands of his supporters and put them on mass trials, intensifying crackdown on dissent.
The Cairo court sentenced two others to seven years in prison.
Last week, another Egyptian court sentenced the leader of the Muslim Brotherhood Party Mohamed Badie and 682 supporters to death. The court issued the verdicts during a hearing in the southern province of Minya on Monday, April 28.
The same court also reduced the death sentences of 492 out of the 529 people it had already passed verdicts on in March to life imprisonment.
The action followed international outrage over the mass execution sentence.
RA/MB