I have a requirement to have an aggregate object with member being the root of the aggregate (see examle object graph below).  The PersonalAccountDetails will be a collection of PersonalAccounts.

So far I have added textstring properties to the MemberType for FirstName/LastName, I am unsure how best to go about storing the PersonalAccountDetails in Umbraco.  What I was thinking of doing was having a seperate table and doing a lookup against the email address as it is a unique key in our database.  This seems messy to me is there a better way of going about this?

Thanks in advance.

i.e.
Member
|-FirstName
|-LastName
|-PersonalAccountDetails
  |--Id
  |--CurrentValue
  |--AccountType
  |--...