Concept:
Matrilineal societies trace family lineage and inheritance through the mother's line.
Step 1:
In matrilineal societies, descent, inheritance, and family identity are traced through women.
Step 2:
Khasi and Jaintia communities of Meghalaya are well-known matrilineal societies.
\[
\text{Khasi and Jaintia are matrilineal}
\]
Step 3:
The Nair community of Kerala also traditionally follows matrilineal practices.
\[
\text{Nair is matrilineal}
\]
Step 4:
Gujjars generally follow a patriarchal and patrilineal social structure.
\[
\text{Gujjars are not matrilineal}
\]
Step 5:
Hence, the correct answer is Gujjars.
\[
\boxed{\text{(4) Gujjars}}
\]