Great names. But how are you pronouncing Elias? I always thought it was El-eye-us but I have met two children called Elias recently who pronounce it Elly-us. So like Elliot but ending in S.
Anyway I love Elijah and Elliott but both are getting quite popular, as is Eli. I know 3 children under 5 called Eli, two of which are actually Elijah. I also know an Elijah who doesn't shorten it.
(I work in schools hence I meet a lot of children!)