I was reading a text from Hans H. Øberg, and I saw in the text the following sentences:
Noli dicere 'tatam' et 'mammam', Iuliola! Ea nomina a te audire nolumus. Ita loquuntur parvuli infantes, nec sermo infantium te decet. 'Patrem' et 'matrem' dicere oportet!
Those sentences told me that 'tata' was the definition of 'father'. But didn't Roman children call their father ''papa'?
If yes, why did they say tata instead of papa?
If no, where does the name 'papa' come from?