The section asking for "other names used" refers to any other names that you have legally held or been known by in the past, other than your current legal name. This section is important for a few reasons:

Previous Names: Include any previous legal names you may have had, such as a maiden name, a name from a previous marriage, or a name that was legally changed.

Aliases or Nicknames: If you have used any aliases or nicknames consistently in legal or official documents, you should also include these. Please be sure to include any names you may have provided CBP/DHS officers at an inspection point (even if this was an attempted illegal entry).

Variations in Spelling:

In some cases, individuals might have variations in the spelling of their name due to transliteration from another language or clerical errors in official documents. These variations should be included as well.

Purpose:

The purpose of this section is to ensure that USCIS can accurately and thoroughly review your background. It helps in cross-referencing records and ensuring that all information associated with your previous names is considered in your application.

Consistency:

Ensure that the names you list here are consistent with those you've used in other legal documents, such as your birth certificate, passport, previous visa applications, marriage certificates, or any other official records.

Honesty and Completeness:

It's crucial to be honest and complete in listing any other names you have used. Failure to disclose information can lead to complications or delays in your application process, and in some cases, may be considered misrepresentation.

Remember, the "other names used" section is a routine part of background checks and identity verification in immigration processing. It's not intended to be invasive but rather to ensure accurate identification and processing of your application. Please make sure that you don't omit this critical information.

USCIS/DHS has robust records of other names/aliases you may have used in the past (based on past information and biometrics). Any willful omission of this information is highly likely to cause significant delays and risks to your petition. It is also best to upload any relevant documents which clearly explain the reason for using other names.