EDD Product Name
The alias of EDD Product name in Mautic is edd_product_name
This is how you can use edd_product_name custom field placeholder while composing Mautic Email.
<!-- // Lets assume you are writing a Mautic email --> Hello {contactfield=firstname}, How are you doing? Thank you for purchasing {contactfield=edd_product_name}. Thanks, Your name <!-- // Lets assume this is end of your Mautic email body -->
Hence, {contactfield=edd_product_name} outputs the name of the product.