Kronos

Οὗτος* παρὰ Πτολεμαίῳ τῷ Σωτῆρι διατρίβων λόγους τινὰς διαλεκτικοὺς ἠρωτήθη πρὸς Στίλπωνος· καὶ μὴ δυνάμενος παραχρῆμα διαλύσασθαι, ὑπὸ τοῦ βασιλέως τά τε ἄλλα ἐπετιμήθη καὶ δὴ καὶ Κρόνος ἤκουσεν ἐν σκώμματος μέρει. ἐξελθὼν δὴ τοῦ συμποσίου καὶ λόγον γράψας περὶ τοῦ προβλήματος ἀθυμίᾳ τὸν βίον κατέστρεψε. καὶ ἔστιν ἡμῶν εἰς αὐτόν·
Κρόνε Διόδωρε, τίς σε δαιμόνων κακῇ
ἀθυμίῃ ξυνείρυσεν,
ἵν’ αὐτὸς αὑτὸν ἐμβάλῃς εἰς Τάρταρον
Στίλπωνος οὐ λύσας ἔπη
αἰνιγματώδη; τοιγὰρ εὑρέθης Κρόνος
ἔξωθε τοῦ ῥῶ κάππα τε.

* i.e. Διόδωρος Κρόνος

(Diogenes Laertius, Bioi kai Gnōmai 2.112)

When he was staying with Ptolemy Soter, he had certain dialectical questions addressed to him by Stilpo, and, not being able to solve them on the spot, he was reproached by the king and, among other slights, the nickname Cronus was applied to him by way of derision. He left the banquet and, after writing a pamphlet upon the logical problem, ended his days in despondency. Upon him too I have written lines:
Diodorus Cronus, what sad fate
Buried you in despair,
So that you hastened to the shades below,
Perplexed by Stilpo’s quibbles?
You would deserve your name of Cronus better
If C and R were gone.*

* Leaving ὄνος = “ass.”

(tr. Robert Drew Hicks, with his note)