primogeniture
‘the state of being the firstborn or eldest child of the same parents and its right’
Lexical development traced from the Tamil root:
F. primogeniture < M.Lat. primogenitura < La.Lat. primogenitus ‘first-born’ < Lat. primo ‘first in order of time; at first’ < Lat. primus ‘first’ + genitus ‘to beget’ < gignere ‘to beget’ < jen < gene- < Tamil īṉ