It became a bit of a joke, sending "Kylo" anyone but Anakin when the boy attempted to summon him. Dooku had been the first, Sith Lord and lineage kin both. Bail Organa, the Father of Leia's heart, was followed by Han Solo's father. And then they got creative. The entirety of the Vode - and both Boba and Jango Fett. Obi-Wan complained about tainting their shared name. Padme. Qui-Gon Jinn. Owen Lars. Mace Windu. Kister Banai. Plo Koon. Han Solo, leaning heavily on others' strength. And now: Yoda.
Now this one, this one he knows as soon as he sees the pointed ears and there’s this deep-seated horror.
He remembers three things about Yoda.
1. infamously powerful Jedi
2. Uncle Luke still shudders a little when talking about training on Dagobah
3. Ghostly walking sticks can still hurt, because Uncle Luke has been walloped a few times
Kylo Ren is in deep deep trouble