Rock does a great job (through it's History tab) of helping you understand what's changed for a person's profile, including understanding who created that person.

However, what if you want to go backwards, and get a list of all the people that a particular person created? This question came up in Rocket.Chat recently. Here are options for SQL, Lava, and a Report with Lava. You can use these in various places within Rock (depending on how and where you want to expose this).

SQL

SELECT
  [Id]
  ,[FirstName]
  ,[NickName]
  ,[MiddleName]
  ,[LastName]
  ,[CreatedByPersonAliasId] 
FROM Person
WHERE [CreatedByPersonAliasId] = 'xxx' -- replace xxx with the PersonAliasId of the person you want to report on

Lava

{% person where:'CreatedByPersonAliasId == "xxx"' %} //- replace xxx with the PersonAliasId of the person you want to report on
    {% for person in personItems %}
        {{ person.FullName }} <br/>
    {% endfor %}
{% endperson %}

Report column via Lava

1. Create a Data View for newly created persons
   • Applies to: Person
   • Filter: Created Date Time During Range (and then select the appropriate range. I chose 'Last 1 week').
2. Create a report referencing the Data View you created
3. Add appropriate columns to the report. I suggest starting with Person Name and Created Date Time columns
4. Add the creator using Lava, using the following method
   • Include an Id column to the report (but it does not need to be shown in the grid). This will ensure that the report has the PersonId available for Lava use
   • Include a Lava column to the report using the following Lava template:
     

     {% assign pObj = Id | PersonById %}
     {{ pObj.CreatedByPersonName }}