Allegiance (noun)

1. Loyalty or commitment to a nation, a ruler, a cause, or a person.
2. A duty or promise to be loyal to a person, group, or country.

Origin:

Middle english: from old french aliegiance, from alie "allied" (from latin allocare "allocate") + -ance.

Examples:

1. He swore allegiance to the flag.
2. She pledged allegiance to the country.
3. He showed allegiance to his family.
4. She demonstrated allegiance to her friends.
5. He took an oath of allegiance to the company.