The name Rachael is a girl's name of Hebrew origin meaning "ewe". Rachael and is often added to lists like Hebrew Baby Names and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
This form of the Biblical Rachel is well-used despite its somewhat counter-intuitive spelling which can make English speakers think the name should be pronounced with a k sound, as in Raquel. The spelling may be inspired by Michael, but it's pronounced just like Rachel, with a soft ch. Lately it's on the decline, dropping more than 100 places in 2009 and leaving the US Top 1000 in 2013.