Great!!!!! Happy for you. Nothin' better than children..
The names for your two little ones are beautiful. The process that came up with them should be followed.
However, since you asked.
If the uncle names them 'Denice' or 'De-nephew" would work. Plus the hyphen is nifty.
Then there's Hazer if there's any horses or steers around to play with.
Hows about Phineas, Phart or Phogg (I used these for Dogs
Philbert Ogive would be cool.
Rheamer - Heck I kind of like that one.
How about simply "Click"
For a girl Mirage would work.
And there's Wind Drift........
Lug sounds a little red neckie.....