Its a common requirement that the blog module could show profile firstname/lastname instead of username as blog title (which is currently "user's blog" and user is $node->user).
Its not possible to do that unless blog module is altered (highly un-recommended on our side).
There is one suggestion to use theme_username hook instead of $node->user in hook_link and breadcrumb hooks. This way, anyone who would like to alter the username, should just implement theme_username in their themes.

I hope i've explained well. If not please ask me i'll rephrase.

Comments

dpearcefl’s picture

dpearcefl commented

At this point, no new features will be added to D6 (or D7). If you think Drupal 8 needs this feature, please assign this issue to D8.

rafamd’s picture

rafamd commented
Status: Active » Closed (works as designed)

As blog module was removed from core into the "Blog" contrib project, this issue should now be moved to that queue (using the "Project" autocomplete in the issue settings while posting a comment).

So, feel free to reopen and move.

Thanks!