And is a conjunction.

56. A common noun becomes a proper noun when used as the particular name of a ship, a newspaper, an animal, etc.

57. A proper noun often consists of a group of words, some of which are perhaps ordinarily used as other parts of speech.

Examples:

Note. These are (strictly speaking) noun-phrases ([§ 41]); but, since all are particular names, they may be regarded as proper nouns.

58. A proper noun becomes a common noun when used as a name that may be applied to any one of a class of objects.

59. Certain proper nouns have become common nouns when used in a special sense. These generally begin with a small letter.