Specific Rules #5 for Author/Editor (required) for Contributions to Books Vancouver Style: Designations of rank in a family, such as Jr and III

Place family designations of rank after the initials, without punctuation.

Convert roman numerals to arabic ordinals.

Examples:

Vincent T. DeVita, Jr. becomes DeVita VT Jr

James G. Jones II becomes Jones JG 2nd

John A. Adams III becomes Adams JA 3rd

Henry B. Cooper IV becomes Cooper HB 4th

Según:

Citing Medicine: The NLM Style Guide for Authors, Editors, and Publishers [Internet]. 2nd edition. Chapter 2: Books

Related:

General Rules for Author/Editor (required) for Contributions to Books Vancouver Style

Specific Rules #1 for Author/Editor (required) for Contributions to Books Vancouver Style: Surnames with hyphens and other punctuation in them

Specific Rules #2 for Author/Editor (required) for Contributions to Books Vancouver Style: Other surname rules

Specific Rules #3 for Author/Editor (required) for Contributions to Books Vancouver Style: Given names containing punctuation, a prefix, a preposition, or particle

Specific Rules #4 for Author/Editor (required) for Contributions to Books Vancouver Style: Degrees, titles, and honors before or after a personal name

Specific Rules #5 for Author/Editor (required) for Contributions to Books Vancouver Style: Designations of rank in a family, such as Jr and III

Specific Rules #6 for Author/Editor (required) for Contributions to Books Vancouver Style: Names in non-roman alphabets (Cyrillic, Greek, Arabic, Hebrew, Korean) or character-based languages (Chinese, Japanese)

Specific Rules #7 for Author/Editor (required) for Contributions to Books Vancouver Style: Non-English words for editor

Specific Rules #8 for Author/Editor (required) for Contributions to Books Vancouver Style: Organizations as author

Specific Rules #9 for Author/Editor (required) for Contributions to Books Vancouver Style: Options for author names

Examples for Author/Editor (required) for Contributions to Books Vancouver Style