Astonishingly in his US Naturalization record (Arizona, 12 Feb 1948, a previous petition having been rejected in 1910) he includes the children he left behind in Wales! Though he gets Elvet’s name wrong.
His details:
David John Lloyd b 23 October 1875 Dowlais South Wales. Retired.
Fair complexion, grey eyes, grey hair, 110lb, 5ft 4in.
Wife: Sarah (b 8 May 1875 Aberystwyth, immigrated 1881) - married 26 September 1912 at Pittsburgh, PA.
Residence: 340 S 3rd Ave, Tucson, Pima, Arizona.
Children:
Evan b 23 December 1899 Dowlais and resides there
Elfred b 13 September 1901 Dowlais and resides there [Elvet was actually born 16 Nov 1901 I think?]
John David b 25 February 1913 Cleveland Ohio, resides Jackson, Miss.
Lawful entry to the US: at Philadelphia, 8 December 1901 on the Noordland.