Relations between 'fons' and 'frons'

Do the Latin word fons (Ge. fontis) "Spring (hydrology)" and the Latin word frons (Ge. frontis) "front" have a connection with the Old Slavonic подъ (pod') "under, bottom, ground" and пред (pred') "front" respectively? I do such a conclusion because the fons beats out of the ground.

The letter "n" in the words fons and frons, in my opinion, could be an "эвфоническая вставка" euphony addition (Sorry, but I don't know how this term actually translates into the English). The f->п (p),t->д(d), in my opinion could be a Proto-Italic/Proto-Slavic alternation.