Specific Rules #5 for Author/Editor (required) to Citing Entire Reports 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 4: Scientific and Technical Reports

Related:

General Rules for Author/Editor (required) to Citing Entire Reports Vancouver Style

Specific Rules #1: Surnames with hyphens and other punctuation in them

Specific Rules #2: Other surname rules

Specific Rules #3: Given names containing punctuation, a prefix, a preposition, or particle

Specific Rules #4: Degrees, titles, and honors before or after a personal name

Specific Rules #5: Designations of rank in a family, such as Jr and III

Specific Rules #6: Names in non-roman alphabets (Cyrillic, Greek, Arabic, Hebrew, Korean) or character-based languages (Chinese, Japanese)

Specific Rules #7: Non-English words for editor

Specific Rules #8: Organizations as author

Specific Rules #9: No author can be found

Specific Rules #10: Options for author names

Examples for Author/Editor (required) to Citing Entire Reports Vancouver Style