Definition of King's bounty in English:

King's bounty

noun

historical
  • (in the UK) a sum of money given from royal funds to a mother who had had a multiple birth of three or more.

    • ‘Mum and Dad were going to get the King's bounty, but instead they got the Queen's bounty. It was £3, that was quite a lot in those days.’
    • ‘The King's Bounty of £3 has been granted, we understand, to Mr Pendlebury, insurance agent, Westhoughton, whose wife a few days ago gave birth to triplets.’