Is there any way to create a parent/subsidiary relationship in the Leads module?

Is there any way to create a parent/subsidiary relationship in the Leads module?

I know this exists in Accounts module, but I want it in Leads module because the lead is not an Account yet. It hasn't progressed enough to become an account.

If there's no way to do this, then is there a workaround? Or is the only workaround to convert the Leads to Account and just do it that way?

Thank you!