I came up with 5:[ol]
[li]France[/li][li]Greece[/li][li]Wales[/li][li]Spain[/li][li]Laos[/ol]Although Wales may be a bit of a technicality.[/li]And I missed Chad. 6.
My first guess was Laos, wiki indicates that it’s officially the Lao People’s Democratic. But it brings up an interesting problem with the factoid, one-syllable name to whom?
Yes, when I saw Spain on the list, I immediately thought, “But to a spaniard, it’s Espana!” Perhaps it needs a qualifier, “The four countries on Earth with a one-syllable English name.” And I only got France and Chad.
Following the rules of the OP, I’ve come up with France, Spain, Guam, and Wales. But Guam probably doesn’t count since it is a U.S. territory, and I’m not sure if Wales counts either as it is a part of the UK.
Hmmm… Spain! Yeah. Although, the English name is one syllable, but the “native language” name isn’t. Which kind of name did the OP have in mind? Would one-syllable names in other languages count?
Any other European countries? Oh yeah, France!
So, is that four yet. Lemme just look at the spoiler box and see how I did. … Oh yeah, Greece!