Creator: How to combine two forms into 1 lookup field?

Creator: How to combine two forms into 1 lookup field?

Form 1: Add_Invoice_Form
Form 2: Add_Service_Form
Form 3: Add_Material_Form

Forms 2 and 3 both have a field within them called "Name". We want to add a lookup field (dropdown) in Form 1 called "Service/Material Name". This lookup field should combine the "Name" field from both Forms 2 and 3. Is this possible? 

Example: https://www.loom.com/share/f9dbd7535a6f441985a0442bd4dfdcfe?sid=8dd9a6bc-48e7-4584-8e1a-82e2b71553eb