Why Are There Multiple Summons with the Same Name
It resolves even if that spell is countered or otherwise leaves the stack.

Decklist: Jhoira of the Ghitu Commander Deck Jhoira of the Ghitu | Illustration by Kev Walker Commander (1) Creature (15) Aeon Chronicler Artisan of Kozilek Blightsteel Colossus Consecrated Sphinx Cresting Mosasaurus Deep-Sea Kraken Detritivore Emrakul, the World Anew Jhoira's Timebug Jin-Gitaxias, Core Augur Phyrexian Metamorph Rift Elemental Shivan Sand-Mage Walking Atlas Zo-Zu the Punisher Artifact (10) Ankh of Mishra Fellwar Stone Izzet Signet Lightning Greaves Mind's Eye Possessed Portal Sol Ring Thran Dynamo Vedalken Orrery Winter Orb Enchantment (11) Braid of Fire Eldrazi Conscription Fervor Leyline of Anticipation Manabarbs Mystic Remora Paradox Haze Rhystic Study Sneak Attack Stasis Training Grounds Instant (10) Arcane Denial Chaos Warp Clockspinning Counterspell Crimson Wisps Evacuation Fury Charm Mindbreak Trap Reverberate Timecrafting Sorcery (17) Apocalypse Blasphemous Act Capture of Jingzhou Decree of Annihilation Heat Shimmer Jokulhaups Mana Geyser Obliterate Rise of the Eldrazi Savor the Moment Stitch in Time Temporal Manipulation Time Warp Walk the Aeons Wheel of Fate Windfall Worldfire Land (36) Cascade Bluffs City of Brass Darksteel Citadel Exotic Orchard Glacial Chasm Island x11 Izzet Boilerworks Mountain x11 Reflecting Pool Scalding Tarn Shivan Reef Temple of the False God Urza's Mine Urza's Power Plant Urza's Tower Vesuva Jhoira of the Ghitu has expensive taste but puts things on layaway and pays a cheap price for them

Some are reprints of classic commanders, others are among the seventy-one potential commanders introduced in the set
It's also key to note that the card states you may put a creature and/or a land, meaning you can do both if you have the cards in hand
Alongside gorgeous art that depicts the city both in its heyday and as ruins, Zanarkand features the Town type for land, which will be sure to raise some eyebrows