Hi, this sounds similar to reviewing process improvement where at time X a change is made and we want to look at the before/after, and the various CV/resume visualizations where once a skill is gained it is displayed (and potentially shown over time).
If this is more of a CV situation then I'd probably do something like this with a record per life event:
There's a canonical Person ID identifier that works across the different Name values. If you wanted to have some sort of before/after display or length of event (for example for a Gantt chart) then you could use self-joins or LOD expressions in Prep or self-joins or LOD expressions or table calculations in Desktop to help compute what you need.
If it's more of a process improvement situation then I'd set up the data something like this:
Where the Knighted Date is joined in with a cross product and the Before/After Knighting is computed with a calculated field. This could be done in either Prep or Desktop.
If you have more questions then I suggest you post some sample data, potentially a packaged flow or workbook, and a description of the outcome you are trying to achieve. Please see Packaged workbooks and flows (and Tableau Public links): when, why, how for more information on why we ask.