jelani maraj (mugshot)

*Nicki’s got her brother’s back.

After being arrested and charged for raping a pre-teen, Jelani Maraj has had his $100,000 bail paid for by his little sister Nicki Minaj.

The pop star put up the bond on Friday in Nassau County, NY. Maraj, 37, stands accused of first degree rape and first degree sexual conduct with a 12-year-old.

According to the NY Post … court docs show Minaj, 32, used 2 of her homes in NY as collateral for the bond.

She and brother Jelani are very close. She paid close to $40k for his wedding back in August.

nicki minaj & jelani maraj (tmz-instagram pic)

(photo: TMZ/Instagram composite)