Casey walked to the backdoor of the Hamato house and knocked. Through the backyard was the easy way to the house from the direction Casey came from, and he and Raph joked that backdoor friends were the best. "Hey." Raph said, opening the door. "Warning. We have a pair of 'study buddies' over."

"Who?" Casey questioned.

"You ever heard of 'Pigeon Pete' and 'Sir' Malachi?" Raph responded, looking a bit annoyed.

"Don't 'cha hate it when teachers assign partners?" Casey laughed.

"Kinda had to in this case. We're covering Medellin genetics in Bio." Raph explained. "And since my family is the pretty much the easiest game of 'spot the difference' ever, we had to get paired up with someone who could actually provide examples."

"What are you talking about?" Casey asked in mock confusion, "You and Leo are practically twins." Raph playfully punched Casey's arm as they walked into the dining room where Mikey, Pete, and Malachi had a bunch of pictures spread out.

"And this is my Uncle William." Malachi stated, holding up one picture. "He has free ears and a big nose."

"Got it." Mikey said, jotting down what Malachi said in a note book.

"Wait. Is Uncle William from your mom's, or your dad's side?" Pete asked, trying to figure out where to add the name to the family tree.

"He's my mom's brother." Malachi answered. "And I suppose we shouldn't factor in Aunt Linda, since she's my Aunt by marriage."

"I think we're supposed to include everyone." Pete said, "Maybe we'll get extra credit if we put in all your cousins!"

"My tree is written up as far as I can go." Leo stated, holding up a large sheet of paper. "Dad says he'll help me dig up some good photos of mama and papa when he gets home."

Casey looked it over, Leo had two branches leading to his name. The one that Casey figured was his biological branch read 'Oroku, Izumi S.' and 'Oroku, Saki'. He let his eyes roam the adopted branch, beside the name 'Oroku, Leonardo Y.' were the names: Hamato, Miwa K. / Boone-Hamato, Raphael V. / Hernandez-Hamato, Donatello H. / and Singh-Hamato, Nandi M. A.

Casey turned to Raph and asked, "What's 'V' stand for?"

"Virgil. After the great Roman poet." Raph explained. "In case you couldn't guess, my uncle was an art major and a literature minor."

"And either horrible at divination, or psychic and sarcastic." Mikey added, earning a laugh from Leo.

"What about Y?" Casey grinned tapping Leo's name.

"Yoshi. Papa chose it, in honor of his best friend." Leo explained.

"How about K?" Casey asked, setting his fingertip on Miwa's name.

"Kazumi."

"H?" Malachi inquired, pointing at Donnie's box.

"Hernandez."

"Donatello Hernandez Hernandez?" Malachi asked, leaning over to look at the tree.

"In Guatemala, a kid has their mother's maiden name as their middle name. Donnie's bio mom wasn't married though, so his middle and last names were the same."

"Nandi?" Malachi asked, pointing to the seemingly out of place name.

Mikey looked up from the chart he was writing. "My first name. But I usually use my second name."

"What's the third?" Pete asked, peering over at Leo's tree.

"Aahlaad." Mikey answered.

"Nandi Michelangelo Aahlaad Singh-Hamato." Malachi recited. "Has I nice ring to it."

Casey looked again at the biological branch. "I thought I heard your dad refer to your bio dad as 'Oroku'."

"Yeah. Dad and papa were in school, martial arts, and sports teams together all their lives, so they were practically brothers. Normally, when you get that close to someone, you call them by their first name. But when they were somewhere around twelve or whatever, they decided last names sounded better, so they just dropped the honorifics to show familiarity. Mom uses first names, though, because she's always thought it sounds cozier."

Raph clapped Casey on the back, "See Case, you thought you were coming over to hang, but really, this was an anthropology lesson all along."

"Isn't anthropology like, bugs, and stuff?" Pete asked. "You know, because 'ant'!" He added, upon having four confused faces turn to him.

Leo dropped his forehead into his palm, as Pete gave an indignant cry of, "What!?"