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.
What does Husna mean?
From Arabic حسنى (ḥusnā), the feminine/superlative built on husn 'beauty' (root ḥ-s-n). Means 'most beautiful' or 'what is best/most beautiful'.