Your search for "Claude x Byleth" revealed the following:
Black Butler YAOI Doujinshi - Yes! Marry Marry (Claude x Sebastian Alois x Claude and Ciel x Sebastian)
$ 26.95Product details: Claude x Sebastian, Alois x Claude and Ciel x SebastianTwo Claudes gang up on Sebastian and dress him...
Fire Emblem 0 (Cipher) Trading Card - B18-032SR+ Fire Emblem (0) Cipher (SIGNED FOIL) The Master Tactician Claude (Claude von Riegan)
$ 402.95Product details: Claude von RieganThis lovely card is from the Fire Emblem 0 (Cipher) trading card game B18 Oratorio of...
Fire Emblem 0 (Cipher) Trading Card - P20-008PR Fire Emblem (0) Cipher The Young Mercenary Swordswoman Byleth (Female) (Byleth Eisner)
$ 16.95Product details: Byleth EisnerThis lovely card is from the Fire Emblem 0 (Cipher) trading card game! Beautiful Byleth came from...
Fire Emblem 0 (Cipher) Stationery - B19 Winter Cipher Campaign Claude Pixel Memo Pad (Claude von Riegan)
$ 16.95Product details: Claude von RieganThis cute memo pad was given out at a bonus when you purchased a B19 box....
Fire Emblem 0 (Cipher) Trading Card - B22-095N Fire Emblem (0) Cipher Meticulous Leader of the Golden Deer Claude (Claude von Riegan)
$ 3.95Product details: Claude von RieganThis lovely card is from the Fire Emblem 0 (Cipher) trading card game B22 The Heroes...
Fire Emblem 0 (Cipher) Trading Card - Marker Card: Claude The Master Tactician - CM97 Promo Marker (Claude (Fire Emblem) Claude von Riegan / Claude)
$ 67.95Product details: Claude (Fire Emblem), Claude von Riegan / ClaudeThis lovely card is from the Fire Emblem 0 (Cipher) trading...
Star Ocean 2 Trading Card - Lord of Vermilion 3 ver.3.5SS Human 5-064 ST Claude (FOIL) (Claude C. Kenny / Claude Kenny / Claude)
$ 13.95Product details: Claude C. Kenny / Claude Kenny / ClaudeThis excellent card is from the Lord of Vermilion Trading Card...