What does Sadia mean?
Sadia (سعدية, sa'diyya) comes from the Arabic root s-'-d ('happiness, good fortune', as in sa'ada) and means 'fortunate, lucky, blessed with happiness'. Also transliterated Saadia, Sadiya or Saadiya.
What does Kalila mean?
An Arabic feminine name linked to the root kh-l-l behind khalil 'close friend, companion, beloved'. Sources give both 'beloved/sweetheart' and 'dear friend'; the 'friend' sense is the more literal core, so treat 'beloved' as the affectionate extension.