A List of Mahrams

Mas-alah: The offspring of your parents, that is the males and females who are born (either directly or indirectly) from your parents, such as your brother, sister, nephew, niece, and their offspring and descendants all are haraam. [That is, they are all mahrams and it is not permissible to marry them. Going for Haj with them is permissible.] (Fataawa Raheemiyyah, Aalamgeeri)

Mas-alah: Your father’s [and mother’s] brothers [paternal and maternal uncles], are Mahrams. (Fataawa Raheemiyyah)

(Mukammal Wa Mudallal Masaail-e-Haj Baraae Khawaateen)