Omanathanikal kidavo.. is a lullaby in Malayalam (a language spoken in South India).
This was composed by the court-poet Irayimman Thampi, as a lullaby for this nephew, the new born
Swati Thirunnal, heir to kingdom of Travancore. The lyrics are exceedingly beautiful -
https://en.wikipedia.org/wiki/Omanathinkal_Kidavo
As fate would have it, Irayimman Thampi also had to compose an elegy for Swati Thirunal.