As per SSM Malaysia, some possible reasons for the rejection of the company name are as follows.
undesirable or unacceptable
identical to an existing business entity under the registers kept pursuant to laws administered by the Companies Commission of Malaysia
identical to a name reserved under the registers kept according to laws administered by the Companies Commission of Malaysia
a name of a kind that the Minister has directed not to accept to be registered.
You can refer to the following link for additional company registry guidelines.