Using information captured on another form for dropdown box

Using information captured on another form for dropdown box

HI there,

I have two forms, one with referral data and one with broker data

On the referral form I have a dropdown box  which need to create  a list of brokers which I create through the broker form

The referral list includes the following fields

Broker: (Dropdown)
First Name: (Single)
Last Name (Sinlge)

The broker list includes the following
First Name (Single)
Last Name (Single)

Thus I need the Broker dropdown in form(Referral) to have List of brokers that was created by through the form(broker)
The list should combine the Last Name and First Name of Broker

ex:  form(Broker)
First Name: Koos
Last Name: Roos

form(Referral)
Broker dropdown box: Roos, Koos

Hope someone will be able to assist with this