Going to answer these two anon asks together since they go hand in hand!
There are a few older Hoenn fankids who are married and/or have children, though for now only Jasper and Maia’s children have names. Here’s the breakdown.
Jasper Stone-Lǚ & Rowan Lǜ (OC) – Jade (son) & Thalia (daughter)
Maia Stone-Lǚ & Kiran Akamine – Larimar (son)
Anthony Kaʻanāʻanā – ward/foster father of a currently unnamed much younger second or third cousin from Sidney’s side of the family
Landon Fáng & Angelica Noha – currently unnamed son, currently unnamed twin daughters
Rowan, for now, is an OC! If in a future generation, or maybe anime location, they create a setting/characters I think work for him, he will be added as a fankid, but for now he and a few others who he knows/interacts with are total OCs. He’s generally pretty reserved and can even be considered uptight, but mostly that’s just how he expresses himself and is actually quite passionate (esp with Jasper haha). He also gets along very well with Maia and the two make quite the formidable siblings-in-law team. Rowan is a member of the Lǜ family, which is a sibling clan of sorts to the Lǚ family Jasper is part of. Centuries ago, they were one clan, but a pair of infighting clan heads split the family up into the two they are now, and eventually the Lǚ moved to Hoenn. Now, in modern times, both families keep the old traditions of their original clan alive and meet every 10 years to exchange news, have martial arts tournaments, celebrate traditions, and generally have a fun time with friendly rivalry. Jasper and Rowan first met when they were both children at one of these gatherings, but the meeting didn’t exactly go well as Jasper dragged Rowan away from adult supervision to show him the best swimming spots, causing both to end up scolded. Rowan, who was a very rules-conscientious child, decided then and there that Jasper was a menace. But, ten years later, when the conference was hosted by Rowan’s family, he ended up helping Jasper when he got stuck in the woods after injuring himself exploring. After that encounter, they developed feelings for each other very quickly, and they started dating not long after (much to the bafflement of many friends and family. Love works in strange ways….) They traveled the world together for a while, but after Jade was born they decide to settle in Sootopolis.
Pokémon Legends & Legacies 