Surname spelled incorrectly for his birth registration.  Ontario, Canada Births, 1869-1907 Record info about John Howard Nadwelle
Name: John Howard Nadwelle Date of Birth: 5 Feb 1885 Gender: Male Birth County: Grey Father's Name: Andrew Nadwelle Mother's Name: Anna Bell Hunter Roll Number: MS929_70

1900 United States Federal Census Record info about Howard Nodwell
Name: Howard Nodwell Home in 1900: Olga, Cavalier, North Dakota Age: 15 Estimated birth year: abt 1885 Birthplace: Canada Race: White Relationship to head-of-house: Son Immigration year: 1889

It would appear he was using the name Howard circa 1900 as that is what was reported on the census.