The son of the uncle of your Prophet ﷺ, i. e. Ibn Abbas, reported Messenger of Allah ﷺ as saying: It is not meet for a servant that he should say: I am better than Yunus b. Matta (and this Matta) is the name of his father. (Using translation from Muslim 2377)
حَدَّثَنِي ابْنُ عَمِّ نَبِيِّكُمْ ﷺ يَعْنِي ابْنَ عَبَّاسٍ قَالَ قَالَ رَسُولُ اللهِ ﷺ لَا يَنْبَغِي لِأَحَدٍ أَنْ يَقُولَ أَنَا خَيْرٌ مِنْ يُونُسَ بْنِ مَتَّى وَنَسَبَهُ إِلَى أَبِيهِ