I was surprised by the choice of 'Mother of Wi-Fi' though - Wi-Fi hasn't used 'frequency hopping' as such since 802.11b was released back in 1999 - so very few people will have ever used frequency-hopping Wi-Fi.
GPS only uses it in some extreme cases I think, but I'm not an expert.
However, Bluetooth absolutely does depend on it to function in most situations, so 'Mother of Bluetooth' might have been more appropriate.
I guess my point is that it isn't a particularly important part of the design of Wi-Fi - they included it in the very first iteration in 1997 and realised by 1999 they didn't need it. Therefore Wi-Fi would likely have been born regardless of the invention; Bluetooth would not.
However, Bluetooth absolutely does depend on it to function in most situations, so ‘Mother of Bluetooth’ might have been more appropriate.
Considering the namesake of Bluetooth, the "Mother of Bluetooth" sounds like the kind of person who would have a tea party with "Grendel's Mother" from Beowulf.