Marshmallow

A sweet choice for a pet, and an endearing 'at-home' nickname for a little Marlowe, Marla, or Martha, Marshmallow is associated with the soft, chewy confectionaries that you might toast over a campfire. These sweet treats were inspired by the medicinal mixture made from the marsh-mallow plant (Althaea officinalis), originally used to treat coughs.

Technically then, Marshmallow might be considered a floral name, though you'd probably be better off saving it for a pet name (in both senses of the term).

Pronounced MARSH-mal-oh.