der Kubaner
Cuban
A male citizen of Cuba or a male person of Cuban origin.
Mein Tanzlehrer ist Kubaner und hat uns Salsa beigebracht.
My dance teacher is Cuban and taught us salsa.

Cuban / Cuban cigar
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Cuban
A male citizen of Cuba or a male person of Cuban origin.
Mein Tanzlehrer ist Kubaner und hat uns Salsa beigebracht.
My dance teacher is Cuban and taught us salsa.

The word is derived from the country 'Kuba' (Cuba). The ending '-aner' is often used in German to refer to male inhabitants of a country or city.
Er ist Kubaner und lebt seit fünf Jahren in Deutschland.
He is Cuban and has been living in Germany for five years.
Whether a person or a cigar is meant can be recognized from the context. Verbs like 'rauchen' (to smoke) or 'anzünden' (to light) point to the cigar, while verbs like 'kennenlernen' (to meet/get to know) or 'sprechen mit' (to speak with) point to the person.
Ich habe im Urlaub einen netten Kubaner kennengelernt.
I met a nice Cuban on vacation.
The use of 'Kubaner' for a cigar is colloquial. In a formal conversation or in a specialist shop, one would be more likely to say 'kubanische Zigarre' (Cuban cigar).
Nach dem Essen rauchen die Freunde gern einen Kubaner.
After dinner, the friends like to smoke a Cuban cigar.
cigar
'die Zigarre' and 'der Kubaner' can both refer to a tobacco product for smoking. 'Zigarre' is the general word for this rolled tobacco product. 'Kubaner' is colloquial and means a cigar from Cuba. The words can be confused because a 'Kubaner' in this sense is also a cigar. But not every cigar is a Kubaner. Also, 'Kubaner' can also mean a male person from Cuba, so context is important.

Zum Geburtstag bekam er einen teuren Kubaner geschenkt.
For his birthday, he was given an expensive Cuban cigar.
Nach dem Essen zündete sich Herr Schneider eine Zigarre an.
After the meal, Mr. Schneider lit a cigar.