The “pt-” in “pterodactyl” makes the “te” sound. The “-ough” in “though” makes the “oh” sound. The “neigh-” in “neighbor” makes the “nay” sound. So, following that set of English grammar rules, the name “Tony” can be spelled as “Ptoughneigh.”
Don't we love English? Trying to learn English grammar is comparable to trying to guess what Hoid wants with the cosmere. So many plausible ideas, but they all have flaws and plot holes.