Dependants can only apply under the Graduate Route if they already held dependant permission on the student's visa. The only exception is a child born in the UK during the student's visa period.
You cannot bring new dependants to the UK after you apply for the Graduate Route visa. For more information, please visit the gov.uk website.
If you have further questions, please complete our self-referral form and a member of the team will be happy to assist you.