Final answer:
The last name of the first client in a lawsuit is generally the petitioner, which is the first-named party in the case, such as 'Brown' in Brown v. Board of Education.
Step-by-step explanation:
The last name of the very first client in the lawsuit provided in the context would likely be found as the first-named party in a case name, which is usually listed in italics and shows the petitioner versus the respondent. For instance, in Roe v. Wade, 'Roe' is the last name of the petitioner. Similarly, in the landmark case of Brown v. Board of Education (1954), 'Brown' is the last name of the parent—Oliver Brown—who was one of the lead plaintiffs. When a case is on appeal, the name that appears first in the case title is the party who was dissatisfied with the lower court's decision and is therefore bringing the appeal.
To accurately identify the last name of the first client in a lawsuit, we look at legal documents or case titles, where the name of the petitioner is typically listed first. It should be noted, though, that the specific details provided may not always conclusively determine the last name without additional context about the case.