Familywise, I nickname the founders MacUthar (Uthar is "first" in DF Dwarven). Everyone who has relatives after that gets a family nickname in order of arrival. The first gets MacNob (Nob is "two" in DF Dwarven), and all of the others get nicknames starting with McA through McZ (note Mc instead of Mac). If a newcomer has a relation already living in the fortress, they get that family nickname. Migrants with absolutely no relatives just get "A" for a nickname (for "alone"). If they ever marry into a clan, they will take that clan's nickname. Sometimes new arrivals tie together two or more families who are already present. Everyone then gets the family nickname of the earliest migrant. The same thing would happen with a marriage but so far I have had no marriages in 34.x except for between MacUthars. I usually end up with one large family and quite a few small ones, not counting the founders.
This playing about with family names keeps me entertained during seiges and the like.
As far as professions, I use the following custom categories which I only apply after all of the migrants have arrived.
Crafting: gem workers, glass-makers, weavers, clothiers, all crafters except metal-crafters
Defense: all of the red-shirts, plus the animal trainers and bowyers
Forges: all of the metal-workers
Gov-X: all of the government workers, they have their position in their profession name, eg Gov-Broker, for purposes of assigning offices and such
Harvest: planters, butchers, tanners, fishery workers, beekeepers, milkers, plant gatherers, can haul food only
Haulers: everyone who isn't something else, except for Babies and Children, these do all of the hauling, cleaning, recovery of wounded, and mass masonary projects
Health: all medical staff, wood burners, lye makers, soap makers
Kitchen: brewer, cook, miller, thresher, cheesemaker, presser
Lumberyard: carpenters and wood cutters
Quarry: miners, masons, engravers, architects
Everyone can carry food and water to prisoners and patients.