Email List Clean-Up and Enhancement

I have a messy spreadsheet of email addresses that needs to be cleaned up. The project includes extracting the company names from the email domains, adding names sourced from LinkedIn or the company website, and removing duplicates. The cleaned-up spreadsheet should be delivered in Google Sheets.

Requirements:
- Proficient in Google Sheets
- Experience with data cleaning
- Able to source names from LinkedIn or company websites
- Attention to detail to remove duplicates

The final spreadsheet should include:
- Email addresses
- First name and last name in separate columns
- Company names extracted from the email domains